Who have supported Vietnam in areas

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Câu 20:
A. who have supported Vietnam in areas
B. in which have supported Vietnam in areas
C. which have supported Vietnam in areas
D. whose have supported Vietnam in areas

Câu 21:
A. the country is also become a key player into region of trade agreements
B. the country has also become a key player in regional trade agreements
C. the country is also becoming the key player of regional agreements trade
D. the country will also become the only key player from the region of trade agreements

Câu 22:
A. that needs to address.
B. that need to be addressed.
C. that needs to be addressing.
D. that need to be addressed.