Kevin Burns 5

Kevin burns 5.5 cal\min by walking at a speed of 4.5 miles per hour. He is also able to have a conversation while performing this moderately intense physical activity. What effect does this activity have on his breathing and heart rate?

A) Little to no change in his breathing and heart rate
B) A slight change in his breathing but no change in his heart rate
C) A slight increase in both his breathing and heart rate
D) No change in his breathing but a significant change in his heart rate
E) A significant change in both his breathing and heart rate