问题
Dad,could you buy me a MP4 like this? — Sure, we can buy ____ one than this, but ____this. [ ]
A: a worse, as good as
B: a better, better than
C: a cheaper, as good as
D: a more important, not as good as
B: a better, better than
C: a cheaper, as good as
D: a more important, not as good as
正确答案是：
