Mark the letter A, B, C, or D to indicate the correct answer to each of the following questions.
They have considered all the fifty applications, x seems suitable for the position
A. none of them
B. none of whom
C. none of these
D. none of which
Câu này hỏi về cách dùng đại từ quan hệ. application: đơn xin việc ( chỉ vật…) => Đáp án là D.