Which of the Following Interpretations Is Consistent with the Correlation

Multiple Choice

Which of the following interpretations is consistent with the correlation between intelligence scores and the number of neurons in the brain

A) Having a higher number of neurons in the brain produces intelligence.
B) A rich intellectual environment stimulates neuronal production in the brain.
C) Good nutrition both yields intelligence and stimulates neuronal production.
D) Each of these interpretations is consistent with the correlation.