Answer: B. DIET
Explanation: The other factors are benefits of exercise. Diet is the only variable that isnt a benefit.
I had to do a report on this disease the other day and learned that in March of this year there were and estimated 5.5 million people of the age 65 and over here in the U.S. with this disease. That is like 1 in 10 that has it. I hope this helps you.
Basal sleep need is the amount of sleep your body needs on a regular basis.
Hope this helps!