According to the Introductory Information About Cognitive Skills in Elderly

According to the introductory information about cognitive skills in elderly people,

A) in general, elderly adults are more confident about their skills than young adults are.
B) other variables-such as health or education-can explain part of the age-related cognitive differences.
C) when researchers eliminate several other relevant variables, elderly adults and young adults have almost identical cognitive abilities.
D) in general, elderly adults and young adults have had similar recent experience with memorizing material.