题目内容
（请给出正确答案）
[主观题]
One of the possible reasons for the zoo - rasied elephants' problem______.A．they do not ge
One of the possible reasons for the zoo - rasied elephants' problem______.
A．they do not get proper food
B．they do not live in family group
C．they do too much exercise
D．they live in large herds
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