Difference (A) conversation efforts have been made (B) in order to40/50Pick out the letter A, B, C, or D to indicate the underlined part that needs corrrections in each of the following questions. Difference (A) conversation efforts have been made (B) in order to saving (C) endangered species (D).Differencehave been madeto savingendangered speciesGiải thíchĐáp án C