Tax Collections by the Federal Government of the United States

Tax collections by the federal government of the United States, in general,

A) declined faster than real GDP during the recessionary periods that punctuated the past three decades.
B) increased faster than real GDP during the boom periods that marked some years of the past three decades.
C) served as one of many automatic stabilizers that worked to keep aggregate demand more stable than it otherwise would have been over the past three decades.
D) all of the above.
E) none of the above.