In a Series of Studies by Meaney and Colleagues,rat Pups

Multiple Choice

In a series of studies by Meaney and colleagues,rat pups were randomly assigned to be raised by surrogate mothers who spent a lot of time licking and grooming (high LG) them or surrogate mothers who spent little time engaging in this behaviour (low LG) .Rat pups raised by high-LG surrogates 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