A.Therefore
B.However
C.Otherwise
D.Although
Giải bởi Vietjack
Đáp án đúng: A
Giải thích: Therefore: Vì thế. Đây là câu rút ra bài học sau cả đoạn văn.
Dịch: Do đó, các nỗ lực bảo tồn khác nhau.
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