Since 1950,
A) the average length of expansions in the United States have become longer as compared to before 1950.
B) the average length of expansions in the United States have become shorter as compared to before 1950.
C) economic expansions in the United States have been so short that expansions barely exist.
D) the average length of expansions in the United States are about the same length as compared to before 1950.
A
Economics