The reason ________ he didn’t come was _______ he was ill.

A．why; that

B．that; why

C．for that; that

D．for which; what

对于某行权价为13元的股票期权，以下理解正确的是（）。

A.认购期权买方在期权到期时有权利以13元买进标的股票

B.认购期权买方在期权到期时有权利以13元卖出标的股票

C.认沽期权买方在期权到期时有权利以13元买进标的股票

D.认沽期权买方在期权到期时有权利以13元卖出标的股票