Which issue is related to long-term cocaine use? mental alertness
paranoia
extreme happiness
O sensitivity to light

B.) Paranoia

Explanation:

Many cocaine users report that after a longer period of time after using cocaine, they usually feel extremely paranoid for no given reason.

This a common effect.

(Btw, it's not sensitivity to light, as that is usually a short-term issue)

what effect does exercise have on the nervous system?

the answer is c.