The Results of the Seattle Longitudinal Study, Which Combined the Features

Multiple Choice

The results of the Seattle Longitudinal Study, which combined the features of cross-sectional and longitudinal studies, showed that

A) earlier cross-sectional studies were accurate.
B) earlier longitudinal studies were accurate.
C) some aspects of intelligence do decline, but others increase through adulthood.
D) intelligence does decline through adulthood, and it does so much more rapidly than either cross-sectional or longitudinal studies predicted.