THAT BOOK / VERY THICK / BELONG / YOUNGER SISTER. A. THAT BOOK, WH...

That book / very thick / belong / younger sister.

A. That book, what is very thick, belongs to my younger sister.

B. That book, that is very thick, belongs to my younger sister.

C. That book, which is very thick, belongs to my younger sister.

D. That book, which is very thick, belongs my younger sister.