The Daughter of an 82-Year Old Patient Tells the Nurse,"When

The daughter of an 82-year old patient tells the nurse,"When I ask my dad to do something,it takes him a long time to respond to me.But he does do what I ask." Which is the most appropriate response by the nurse is?

A) "At this age, your dad does not have the same intelligence he had when he was younger."
B) "It is more difficult for a man in this age group to learn new things."
C) "Reaction time slows in older adults, so it takes him more time to process your requests."
D) "He is likely developing some dementia, as this is a normal development in his age group."