According to Woodruff-Pak,the Phase I Perspective of Those Who Studied

According to Woodruff-Pak,the Phase I perspective of those who studied aging and intelligence focused on ___________.

A) studying which abilities decline and which ones are maintained with age
B) the method used to study aging and intellectual abilities
C) determining when the peak of intellectual functioning was reached and when it began to decline
D) whether intellectual abilities would improve with training and practice