How well a student studies is most affected by

A. the student's access to technology.

B. the student's study environment.

C. the type of study materials the student has.

D. the number of friends a student has.

B because the student can be stressed out or busy. The environment affects everything

All of these have a pretty big effect on a students studies, but i believe that, B the environment can encompass all of the other answers pretty well, because a good study environment would mean good access to technology for academic purposes, good materials to do work with, and good friends who have a positive influence on you.