The average age of menarche for girls in the U.S. is:

What percentage of people living in nursing homes have Alzheimer's disease?

A. one-fourth B. two-thirds C. two-fifths D. one-third

Diah says, "I know his name! He's married to that famous actress, and he was in all those action movies! His name begins with an A! …I just cannot remember it!" Diah is experiencing ________.

A. proactive interference B. the tip-of-the-tongue phenomenon C. repression D. divided attention