An olympic athlete is recovering from knee surgery and she is under a doctor's care. the doctor has the athlete jog 12 minutes a day for five weeks. after that, the athlete will increase the jogging time by five minutes a day, a week at a time. in what number week will the athlete be jogging more than a hour per day? ?

a) week 17

b) week 13

c) week 15

d) week 12