The Nurse's Neighbour Says, "My Son Has Been Waking Up

The nurse's neighbour says, "My son has been waking up with bad cramps in his calf for the last two nights. He has been working out with his football team in the hot sun." Which additional statement would indicate to the nurse that the neighbour needs more information concerning muscle spasms?

A) "I have my son take a multivitamin every day to help replenish calcium and other minerals."
B) "I think I will give him one of my muscle relaxers before practice today."
C) "I've told my son to point his toes upward and gently massage the calf muscle."
D) "I will remind him to drink Gatorade and water at practice every day."