Respuesta :
Answer:
C) She needs to decrease her weekly run time back to four miles to boost her energy.
Explanation:
Katie increased the intensity of her physical activity quite sharply as she ran six miles and started running eight miles. Since Katie's body is used to the six-mile race, when she runs eight miles it will use up more energy. Ideally, in this case, Katie would slowly increase the miles she runs, that is, she should re-run six miles and gradually increase this distance, so that her body would react better and use less energy.