Research on the Brain Development of Mice Who Are Raised

Multiple Choice

Research on the brain development of mice who are raised in environments offering different degrees of stimulation suggests that the increased intelligence seen in children raised in more stimulating environments is due to:

A) activation of genes involved in forming new neurotransmitters
B) increases in the kinds of neurons formed
C) increases in the number of new neurons formed
D) activation of genes involved in forming new synapses