问题详情

Brendan"s greatest problem is that______.
[A] he can"t be treated as an adult (成年人) by the bank
[B] he can"t make as many games as he wishes
[C] he doesn"t know what to buy with the money
[D] he had learnt to use computers at school请帮忙给出正确答案和分析，谢谢！