After 10 years she changes a lot and looked different from__she used to bea thatb whomc what

After 10 years she changes a lot and looked different from__she used to bea thatb whomc what
After 10 years she changes a lot and looked different from__she used to be
a that
b whom
c what

After 10 years she changes a lot and looked different from__she used to bea thatb whomc what
答案是whom,from后面加宾格的定语从句

whom,因为对应的是她的人 后面那句是不像以前的她

c what = the one that
十年后她变化很大，看起来与之前完全完全不同了

c

b whom