Which of the Following Results Has NOT Been Reported in Rats

Multiple Choice

Which of the following results has NOT been reported in rats that were raised in an enriched environment as compared to rats raised in an impoverished environment?

A) increased number of synapses and synaptic connections
B) thicker myelin sheaths and an increased number of axons
C) increased length of dendrites and more dendritic branches
D) increase in the number of glial cells