When Looking at the Future of Retirement, Which Factor Challenges

When looking at the future of retirement, which factor challenges the concept of an individual's right to retire?

A) As the healthy adult years expand, people can't support 20 or more years of retirement on 40 years of employment.
B) More and more professionals want to retire early.
C) People who make midlife career changes want to retire early.
D) Many people look forward to retirement as a time when they can direct their energy to activities they enjoy more than work.