Critical Reasoning (CR) | Re: Over the past twenty years in the U.S., the average number of hours pe

I was stuck between C and D but picked D.

C talks about the % of people exercising today vs. the % of people exercising 20 years ago, but does not relate to the claim that people exercise less now because they have less free time.
D considers whether people used theadditional time they had 20 years ago for exercising. I think this is what the question is concerned about. Since they have less time now, they can exercise less, but this is only true and relevant if they used the time for exercising
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