They vary but l<span>ead, carbon monoxide, and sulfur dioxide are some of the most common ones that have decreased the most </span>
In this scenario, all of them except Tristan are technically abusing drugs, even if their intentions are pure, like Madeline. You take medicine exactly how your doctor prescribes it to you.
C. Decrease the intensity and inline of the treadmill.
Since Cecelia's heart rate, 187 beats per minute, is already above her target heart rate zone 138 to 175 beats per minute, she should decrease the intensity and inline of the treadmill to lower her heart rate.
Increasing intensity and incline will further hasten her heart rate. The duration of the treadmill timer does not impact Cecelia's heart rate.