一道英语题，急急急！！！！

Question

A:I want to buy a doll.
B:______ about this one?

A.how B.what C.who

答案是B，可是我觉得A和B去都可以，how about 和 what about 都没问题呀，请大家为我讲一下！！

急求，好的加分100！！！~~~ 拜托了！！！

Answer 1

1.bit
2.kind
of
是稍微
一点
的意思
She
is
slightly
fat.

Answer 2

bite
She
is
fat.

Answer 3

选B,因为Mr后面加姓，Jack是名字，A不对，C中Smith同理

Answer 4

指passion
所which
指china
where

Answer 5

应该是C吧？