单选题 The author probably feels that twins' problem ______.

A、 can not be solved because situation is very cruel
B、 can be solved because twins will be separated
C、 can not be solved unless the twins are forced to live in an ordinary environment
D、 can be solved if the adults communicate with them more often

【正确答案】 C

【答案解析】[考点] 本题为事实细节题。
[解析] 文章最后一句的意思是，解决双胞胎智力发展问题的惟一方法是将双胞胎分开培养和教育。