Toby, Stan, Ron, and Edmond are brothers. Which brother is most likely to develop dementia in old age, based on health status and habits?

Toby was born with one leg shorter than the other. He has always had poor coordination and hearing problems. He has been careful to eat a good diet throughout his adult years.

Stan had good health in his youth but has always had a high degree of stress. He is overweight and has developed blood-sugar problems.

Ron has had episodes of depression on and off throughout his adult life. He eats less when he is depressed. He is normal weight and has had normal results for cholesterol and blood sugar.

Edmond was born with a heart murmur. He is allergic to tree nuts. He has a sweet tooth but is normal weight.

A) Toby
B) Stan
C) Ron
D) Edmond