求解一道语法题

The reasons for yesterday’s sharp rise in the stock market were much the same as that behind last week’s rally: a surge in the economy to a 5.6 percent annual growth rate and improved corporate earnings balanced by the lack of signs of inflationary pressure.

A.    that

B.     those

C.     what was

D.    for that

E.     they were

不是很明白怎么做

哪位好心人解释下,谢谢

比较对象reasons, 代名词用those