Poor Quality Orphanages, Such as Those Operated in Romania a Quarter

Poor quality orphanages, such as those operated in Romania a quarter century ago, caused "psychogenic dwarfish." We now know ________.

A) none of the effects are reversible
B) psychogenic dwarfish arises from severe, chronic stress
C) the main underlying mechanism is underdevelopment of the cerebral cortex
D) there is no clear link between chronic stress and brain development