Final answer:
Earning a college degree is associated with the personal benefit of a longer life expectancy due to healthier lifestyles and the social and financial advantages that education provides.
Step-by-step explanation:
A personal benefit of earning a college degree is that you have a longer life expectancy. Education provides upward social mobility and is associated with various lifestyle factors that contribute to physical well-being. Higher education levels have been linked to healthier lifestyles, which may include factors such as increased exercise, a likelihood of seeking medical care and engaging in fewer risky health behaviors. The cumulative effect of these behaviors contributes to a longer life expectancy. While education can also influence social behaviors, such as being more likely to vote given the strong correlation between education level and voter turnout, this is not a direct personal benefit akin to longevity. Therefore, the correct answer to the given options is D. You have a longer life expectancy.