单项选择题

Between which two consecutive two-year periods was there the greatest percent increase in the Democratic receipts()

A. 1981-82 to 1983-84
B. 1985-86 to 1987-88
C. 1989-90 to 1991-92
D. 1991-92 to 1993-94
E. 1993-94 to 1995-96