ethann
Answered

___________ he did to study for the final exam must have been helpful; his grade improved from a B to an A.

A:Which

B:That

C:So what

D:Whatever

Verified Answer :

D: Whatever he did to study for the final exam must have been helpful.

edog92

D: Whatever he did to study for the final exam must have been helpful; his grade improved from a B to an A.