When Financial Markets Went into a Crisis During the Great

When financial markets went into a crisis during the Great Recession,it caused long-run aggregate supply to decrease because

A) there was a decrease in the level of technology.
B) there were new regulations limiting the amount of loans that could be made.
C) the U.S.population and labor force declined abruptly.
D) all across the country,infrastructure began to fail.
E) profits in the financial industry increased.