What Is the Most Common Explanation Given for the Fact

What is the most common explanation given for the fact that infant intelligence is a poor predictor of later intelligence?

A) Infant intelligence tests are not reliable measures of infant intelligence.
B) Intelligence in later childhood is solely the product of environmental influences, so one would not expect high correlations between infant intelligence, which may be attributed to genetic influences, and later intelligence.
C) Childhood measures of intelligence are not valid measures of childhood intelligence.
D) Intelligence in infancy requires different skills than later intelligence.