Researchers have identified a number of characteristics in individuals who have a long lifespan. Which individual may be on the way to a longer than average life expectancy?

a) Rob, who has a job in the construction industry
b) Alice, who has a strong alarm reaction to stressors
c) Ray, who is involved in a number of community and family activities
d) Agnes, who has consumed a diet low in sugar and high in carbohydrates

C