After graduation she reached a point in her career __________ she had to decide what to do.

A．that

B．what

C．which

D．where

一笔为期三年的投资，在三年内分别支付本金和利息，其中第一年末投资 450元，第二年末投资600元，第三年末投资650元，市场利率为10%，则该笔投资的期值为( )元。

A．1654.5

B．1754.5

C．1854.5

D．1954.5