问题如下：
A forward discount indicates:
选项：
A.an expected increase in the demand for the base currency.
B.the points are positive.
C.the forward rate is less than the spot rate.
解释：
C is correct.
If the forward rate is less than the spot rate, the points (forward rate minus spot rate) are negative and the base currency is said to be trading at a forward discount.
考点：Forward Premium and Discount
解析：如果远期汇率低于即期汇率，则forward point (远期汇率减去即期汇率)为负，这被称为远期贴水。此时，基础货币的需求往往呈现下降态势，因此只有C选项正确。
请问a为什么不对，如果贴水，base currency的r大于price currency的r，说明base currency的需求大啊
