Nan swims for 45 minutes a day. She bases her nutritional needs on a 2,000 calorie per day diet. Lately, Nan has felt tired and hungry. What should Nan do to increase her energy?
Consume fewer calories to increase her energy.
Consume more calories to increase her energy.
Decrease her swim time to 20 minutes to boost her energy.
Increase her swim time to 90 minutes to boost her energy.