Mice Raised in an Enriched Environment Showed ________ Compared to Mice

Mice raised in an enriched environment showed ________ compared to mice raised in a standard environment.

A) a reduced preference for a place previously paired with drug injections
B) a greater preference for a place previously paired with drug injections
C) equal preference for a place previously paired with drug injections
D) symptoms of withdrawal when exposed to a place previously paired with drug injections