If a child cries to obtain a new toy, the crying acts as a

Animal studies have shown which of the following to be true?

A) Impoverished environments can actually help shield a young brain from damage caused by teratogens. B) Enriched environments, unfortunately, have no influence on brains damaged by a mother's drug use during pregnancy. C) Enriched environments help the young overcome brain damage by increasing myelinization. D) Enriched environments can help the young brain overcome damage caused by some teratogens.

In earlier cross-sectional studies of age-related changes in intelligence, the typical finding was that crystallized intelligence _________ and fluid intelligence _________ during middle adulthood

a. remained the same or increased; remained the same or increased b. declined; declined c. remained the same or increased; declined d. declined; remained the same or increased