An adolescent is on the football team and practices in the morning and afternoon before school starts for the year. The temperature on the field has been high. The school nurse has been called to the practice field because the adolescent is now reporting that he has muscle cramps, nausea, and dizziness. Which of the following actions should the school nurse do first?

A Administer cold water with ice cubes. B Take the adolescent's temperature. D Move the adolescent to a cool environment. C Have the adolescent go to the swimming pool.