-How do you like the cake?-It's quite different

问题描述:

-How do you like the cake?-It's quite different
-How do you like the cake?
-It's quite different from _____ I had last month.
A.that
B.which
C.the one
D.the one what

C the one ,省略了that,引导一个定语从句
具体怎么解释,还不是很清楚.