He didn't achieve much at school in academic terms but he was of his elders and listened to them.

A. respectful (a): kính cẩn, tỏ vẻ tôn trọng
B. respective (a): riêng, tương ứng
C. respectable (a): đáng kính
D. respected (a): được tôn trọng

Chọn A