A Person Who Is 80 Years Old Would Likely Have

A person who is 80 years old would likely have the most difficulty with which of the following memory tasks?

A) looking up and immediately dialing a seven-digit telephone number
B) remembering to perform a certain task at the same time every day
C) giving you the item you just requested from the refrigerator
D) recalling the day and time of an appointment scheduled for next week