单项选择题

In which of the following pairs of years were the ratios of Republican receipts to Democratic receipts most nearly equal()

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