书名：怪物讲师新多益阅读
页数：p.228
题目：
Employees who believe they are eligible should let their managers know ______
they would like to apply for a pay raise.
(A)that
(B)how
(C)if
(D)who
疑问：答案是c，我选A，解析是说D不能 其他看句意所以选c，但我觉得A的意思没有错啊
(觉得自己有资格的员工应该让主管暸解他们想要加薪)
请问各位大大这题会如何选呢？选A是否有瑕疵？谢谢