I had to buy ________ these books because I didn't know which one was the best.

A. all                  B. none          C. both           D. neither

I had to buy ______ these books because I didn't know which one was the best.

1. A.
   all
2. B.
   none
3. C.
   both
4. D.
   neither

I had to buy ________ these books because I didn't know which one was the best.

A. all                         B. none                    C. both                     D. neither