Mr. and Mrs. Goldberg can best predict their newborn daughter's future intellectual aptitude by

A) carefully assessing the infant's sensory and reflexive responses.
B) observing their daughter's general level of emotional reactivity.
C) obtaining information about their own levels of intelligence.
D) monitoring the age at which their child first walks and talks.

The most accurate predictor of a child's intelligence is the intelligence of their parents. This is based on the idea that intelligence is largely inherited genetically. Therefore, obtaining information about their own levels of intelligence would be the best way for Mr. and Mrs. Goldberg to predict their daughter's future intellectual aptitude. The other options listed may provide insight into the child's development and temperament, but they are not as reliable for predicting intellectual aptitude.