Black Friday is the day following Thanksgiving Day in the United States.In recent years,it has been regarded as the beginning of the Christmas shopping season and most major shops have opened extremely early and offered promotional sales .Black Friday is not an official holiday,but many employees and schools have both Thanksgiving and the following Friday off,followed by a weekend.It has been the busiest shopping day of they ear since 2005. The day's name began in Philadelphia,where it originally was used to describe huge crowds and heavy traffic that would occur on the day after Thanksgiving.The use of the name started before 1961.Later all alternative explanation was made:"Black Friday"indicates the point at which retailers begin to turn a profit or are"in the black". For many years,it was common for retailers to open at 6:00 a.m.,but in the late 2000s many had opened at 5:00 a.m.or even 4:00 a.m..This was taken to a new degree in 2011,when several retailers opened at midnight for the first time. Black Friday Shopping is known for attracting aggressive crowds,with annual reports of terrible noise and crowds of people trampling on other shoppers in an attempt to get the best deal on a product before supplies run out. Black Friday originally referred to  _  .
financial loss a busy shopping day heavy traffic and crowds sad feelings and moments
Question: Black Friday is the day following Thanksgiving Day in the United States.In recent years,it has been regarded as the beginning of the Christmas shopping season and most major shops have opened extremely early and offered promotional sales .Black Friday is not an official holiday,but many employees and schools have both Thanksgiving and the following Friday off,followed by a weekend.It has been the busiest shopping day of they ear since 2005. The day's name began in Philadelphia,where it originally was used to describe huge crowds and heavy traffic that would occur on the day after Thanksgiving.The use of the name started before 1961.Later all alternative explanation was made:"Black Friday"indicates the point at which retailers begin to turn a profit or are"in the black". For many years,it was common for retailers to open at 6:00 a.m.,but in the late 2000s many had opened at 5:00 a.m.or even 4:00 a.m..This was taken to a new degree in 2011,when several retailers opened at midnight for the first time. Black Friday Shopping is known for attracting aggressive crowds,with annual reports of terrible noise and crowds of people trampling on other shoppers in an attempt to get the best deal on a product before supplies run out. Black Friday originally referred to  _  .
A. financial loss
B. a busy shopping day
C. heavy traffic and crowds
D. sad feelings and moments
Answer: