書名：怪物講師新多益閱讀
頁數：p.228
題目：
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
疑問：答案是c，我選A，解析是說D不能 其他看句意所以選c，但我覺得A的意思沒有錯啊
(覺得自己有資格的員工應該讓主管暸解他們想要加薪)
請問各位大大這題會如何選呢？選A是否有瑕疵？謝謝