Since 1966 in the United States, There Have Been

Since 1966 in the United States, there have been

A) six recessions, of which the one beginning in 1979 was the most severe.
B) five recessions of note with unemployment climbing above 9 percent.
C) six recessions, each of which was worse than the recession of the early 1920s.
D) six recessions, but only one that produced unemployment rates above 7 percent.
E) six recessions, of which the one beginning in 1981 was the most severe.