Evidence for Interindividual Variability in Intelligence Is Best Demonstrated When

Multiple Choice

Evidence for interindividual variability in intelligence is best demonstrated when

A) a single test of intelligence is based on assessing many different abilities.
B) the same individual shows improvement in language skills while showing declines in math skills.
C) an individual's singing improves after taking singing lessons.
D) one individual's reasoning skills improve with age while another's declines with age.