Making email easier is a task that several applications and email customers have tried and failed at SaneBox, like many _ , aims to make your digital life easier without forcing you to change your email platform. To be sure, you can apply various priority   classes and groupings using SaneBox. What really makes SaneBox worth checking out is its ability to ensure unimportant and low-priority emails don't take up even a second of your day. When you apply SaneBox to your email client  , it spends a good deal of time scanning your entire inbox, including ones you've already read. This helps the add-on determine which emails are most important to you. From then on you'll only see emails that SaneBox determines are must-reads, with all others falling into a "Later" folder which you can read at your spare time. Each day --- or however often you want it --- SaneBox will produce a report of all the low-priority emails it has collected for you, like a secretary gathering all the odds and ends for a short daily report. If you find an important email has been flagged as low-priority, you can adjust the settings so it never happens again. SaneBox works with all IMAP, WebDAV and OWA email customers including Yahoo, Gmail, AOL, MS Exchange and others. The program also supports OS X's Mail customers, though it requires a bit of adjusting POP-only email services are not supported. You can try out SaneBox for two weeks with no charge and after that point 3 options of subscriptions   are available, ranging from US$2 to $20 per month. What is the main purpose of this passage?
To promote SaneBox. To explain how to use SaneBox. To compare email clients. To introduce new email platforms.
Question: Making email easier is a task that several applications and email customers have tried and failed at SaneBox, like many _ , aims to make your digital life easier without forcing you to change your email platform. To be sure, you can apply various priority   classes and groupings using SaneBox. What really makes SaneBox worth checking out is its ability to ensure unimportant and low-priority emails don't take up even a second of your day. When you apply SaneBox to your email client  , it spends a good deal of time scanning your entire inbox, including ones you've already read. This helps the add-on determine which emails are most important to you. From then on you'll only see emails that SaneBox determines are must-reads, with all others falling into a "Later" folder which you can read at your spare time. Each day --- or however often you want it --- SaneBox will produce a report of all the low-priority emails it has collected for you, like a secretary gathering all the odds and ends for a short daily report. If you find an important email has been flagged as low-priority, you can adjust the settings so it never happens again. SaneBox works with all IMAP, WebDAV and OWA email customers including Yahoo, Gmail, AOL, MS Exchange and others. The program also supports OS X's Mail customers, though it requires a bit of adjusting POP-only email services are not supported. You can try out SaneBox for two weeks with no charge and after that point 3 options of subscriptions   are available, ranging from US$2 to $20 per month. What is the main purpose of this passage?
A. To promote SaneBox.
B. To explain how to use SaneBox.
C. To compare email clients.
D. To introduce new email platforms.
Answer: