In a new study of African elephants，researchers have four distinct characters that are among a group.
A. convinced
B. identified
C. differed
D. existed
网友回答
(答案→)A. convinced
B. identified
C. differed
D. existed
解析：考查动词辨析，A. convinced相信B. identified确认C. Differed不同D. existed存在，句子意思“在研究非洲大象中，研究人员已经确认在一组中四个不同的特点”