单选题
The main attraction of training mature elephants is______.
A、
early financial returns
B、
their willingness to obey their trainers
C、
the avoidance of anxiety in the elephant
D、
that elephants are difficult to keep
【正确答案】
A
【答案解析】
事实细节题。文章第三段说对15至20岁之间的大象进行训练最为经济,因为它们已经能干重活,可以很快挣回饲养它们的开支。所以选项A是正确答案。
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