Using carbo-loading to increase the store of glycogen seems to benefit only those athletes who engage in aerobic activities that are?

ABetween 30 and 60 minutes
BMore than 90 minutes
CLess than 20 minutes
DBetween 50 and 80 minutes.

I chose A for my first answer, but it told me I was wrong and I have looked all in the files and can't find it anywhere! Help would be greatly appreciated :)

Verified Answer :

the aerobic activites that are between 50 to 80 mins. so the answer is D.

good luckĀ 

BMore than 90 minutes.

Carbo-loading or carbohydrate loading is a strategy which endurance athletes use. This is to maximize the storage of enery or glycogen in the liver and muscles.

This strategy is recommended for those who join endurance events lasting more thanĀ  90 minutes.