As Reported by Schaie, Which of the Following Individuals Would

As reported by Schaie, which of the following individuals would be most at risk for cognitive decline?

A) Oliver, who is in good health, works as a gas station attendant, smokes, and is married to Ruby, whose major interest is in soap operas
B) Ena, who enjoys a modest income and is in fair health, but is treated to cruises and other excursions by his children
C) Matthew, who has concerns about his blood pressure but exercises regularly with his wife, Heather, so they can play word games while they jog
D) Joshua, who is housebound due to a chronic illness, but enjoys reading and playing chess online with friends across the world