（​） it is wise to invest in the new project is being discussed.

（​） it is wise to invest in the new project is being discussed.
A、Whether
B、If
C、Weather
D、What
【正确答案】：A
【题目解析】：句意：大家正在讨论投资这项新产品是否为明智之举。主语从句中不缺少任何成分，所以不能用what，选项中能引导主语从句的就只有whether。