When your body burns calories more efficiently, you

Aexercise without fatigue.
Bdecrease the amount of muscle mass and increase the amount of body fat.
Close all your body fat.
Dincrease the amount of muscle mass and decrease the amount of body fat

Verified Answer :

I think its D, I say this because when you work out, you burn calories because your body is busy doing something for a long period of time. You gain more muscles in your legs, and don't gain weight because that would be like eating a tub of ice cream in 10 minutes and expecting, that you would loose 10 pounds... No... Hoped I helped you out!

D. increase the amount of muscle mass and decrease the amount of body fat.
I hope this helps:)