by The staff/ help/ me/ send the money/ very helpful and courteous
A. The staff helped me to send the money were very helpful and courteous
B. The staff that helped me to send the money which were very helpful and courteous
C. The staff whom helped me to send the money they were very helpful and courteous
D. The staff that helped me to send the money were very helpful and courteous
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Đáp án: A
Giải thích: Các nhân viên đã giúp tôi gửi tiền rất hữu ích và lịch sự.
