问题详情

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请帮忙给出正确答案和分析，谢谢！