After several weeks of exercise, a human athlete's resting ...

[luvbio]

After several weeks of exercise, a human athlete's resting heart rate is typically lower than before because
A)  the body needs less oxygen than before.
B)  the body temperature has increased.
C)  the stroke volume has increased.
D)  the cardiac output has decreased.
E)  the body produces less carbon dioxide than before.

[coco]

Choose C

GL