David Krech Studied the Relationship Between Environment and Intelligence by Experimenting

Multiple Choice

David Krech studied the relationship between environment and intelligence by experimenting with rats in specifically-constructed environments. Which of the following is NOT one of his research conclusions?

A) Rearing in an enriched environment results in higher intelligence.
B) Rearing in an impoverished environment results in lower intelligence.
C) Rearing in a specific environment may affect intelligence level, but changing environments will also affect intelligence level.
D) Rearing in an enriched environment affects brain composition.