Final answer:
The average person retiring at age 65 can look forward to an additional 20-30 years of life.
Step-by-step explanation:
The average person retiring at age 65 can look forward to an additional 20-30 years of life (option c). Life expectancy has increased over the years, and by 2050, it is projected that a half a million Americans will be at least 100 years old. The average maximum human lifespan is estimated to be 115 years.