Which Statement Best Summarizes the Research Findings of Kolb and Colleagues

Which statement best summarizes the research findings of Kolb and colleagues with respect to the effects of experience on brain development?

A) Both enrichment and deprivation affected the size and structure of the brain.
B) Deprivation adversely affected the brain size and structure, but enrichment did not affect size or structure.
C) Only the brains of young animals showed effects of enrichment or deprivation.
D) Only the brains of adult animals showed effects of enrichment or deprivation.