Compared to Low-Intensity Exercise,the Excess Post-Exercise Oxygen Consumption Is Greater

Multiple Choice

Compared to low-intensity exercise,the excess post-exercise oxygen consumption is greater in high-intensity exercise because

A) heat production and body temperature is higher.
B) phosphocreatine levels in the muscle is depleted and more oxygen is required to resynthesize phosphocreatine during recovery.
C) blood epinephrine and norepinephrine levels are much higher.
D) all of the above answers are correct