Which Action by a Type 1 Diabetic Patient Indicates That

Which action by a type 1 diabetic patient indicates that the nurse should implement teaching about exercise and glucose control?

A) The patient always carries hard candies when engaging in exercise.
B) The patient goes for a vigorous walk when the glucose is 200 mg/dL.
C) The patient has a peanut butter sandwich before going for a bicycle ride.
D) The patient increases daily exercise when ketones are present in the urine.