In a Series of Studies by Meaney and Colleagues, Rat

Multiple Choice

In a series of studies by Meaney and colleagues, rat pups are randomly assigned to be raised by surrogate mothers who spend a lot of time licking and grooming (high LG) them or surrogate mothers who spend little time engaging in this behavior (low GH) . Rat pups raised by high LG surrogate grow up to be _____ fearful in novel situations, which can be attributed to a(n) _____ in DNA methylation.

A) less; increase
B) less; decrease
C) more; increase
D) more; decrease