假定年利率为8%，年指数股息率为1．5%，6月30日是6月指数期货合约的交割日。4月15日的现货指数为1450点，则4月15日的指数期货理论价格是（）。

A.1459.64点

B.1460.64点

C.1469.64点

D.1470.64点

All flights______because of the heavy snow, we had to take the train.

A．were canceled

B．had been canceled

C．have been canceled

D．having been canceled