Consider the following choices. Which of the following choices is correct?

A. Expansions have become shorter in the second half of the twentieth century compared to the first half
B. Recessions were more severe and lasted longer int he first half of the twentieth century and became shorter and milder in the second half
C. Recessions lasted for a shorter period of time in the first half of the twentieth century than in the second half.
D. Both expansions and recessions last for about the same period of time in the second half of the twentieth century

Answer: B. Recessions were more severe and lasted longer int he first half of the twentieth century and became shorter and milder in the second half