Five years ago, Sally acquired Blackacre, improved with a 15-year-old dwelling. This year Sally listed Blackacre for sale with Bill, a licensed real estate broker. Sally informed Bill of several defects in the house that were not readily discoverable by a reasonable inspection, including a leaky basement, an inadequate water supply, and a roof that leaked. Paul responded to Bill's advertisement, was taken by Bill to view Blackacre, and decided to buy it. Bill saw to it that the contract specified the property to be "as is" but neither Bill nor Sally pointed out the defects to Paul, who did not ask about the condition of the dwelling. After closing and taking possession, Paul discovered the defects, had them repaired, and demanded that Sally reimburse him for the cost of the repairs. Sally refused, and Paul brought an appropriate action against Sally for damages. If Sally wins, it will be because
Sally fulfilled the duty to disclose defects by disclosure to Bill. the contract's "as is" provision controls the rights of the parties.  Bill became the agent of both Paul and Sally and thus knowledge of the defects was imputed to Paul. the seller of a used dwelling that has been viewed by the buyer has no responsibility toward the buyer
Question: Five years ago, Sally acquired Blackacre, improved with a 15-year-old dwelling. This year Sally listed Blackacre for sale with Bill, a licensed real estate broker. Sally informed Bill of several defects in the house that were not readily discoverable by a reasonable inspection, including a leaky basement, an inadequate water supply, and a roof that leaked. Paul responded to Bill's advertisement, was taken by Bill to view Blackacre, and decided to buy it. Bill saw to it that the contract specified the property to be "as is" but neither Bill nor Sally pointed out the defects to Paul, who did not ask about the condition of the dwelling. After closing and taking possession, Paul discovered the defects, had them repaired, and demanded that Sally reimburse him for the cost of the repairs. Sally refused, and Paul brought an appropriate action against Sally for damages. If Sally wins, it will be because
A. Sally fulfilled the duty to disclose defects by disclosure to Bill.
B. the contract's "as is" provision controls the rights of the parties. 
C. Bill became the agent of both Paul and Sally and thus knowledge of the defects was imputed to Paul.
D. the seller of a used dwelling that has been viewed by the buyer has no responsibility toward the buyer
Answer: