More importantly, it is the success (5)_____unites the country on so many levels.
More importantly, it is the success (5)_____unites the country on so many levels.
A. which
B. who
C. that
D. when
A. which
Đáp án C
Kiến thức về ngữ pháp
Cấu trúc câu chẻ: It is/was + …. + that/who + …..