Which of the Following Is One Reason Only a Small

Which of the following is one reason only a small percentage of people belonging to occupational pension plans ever collect a full pension?

A) Many plans have a variety of conditions that effectively prevent full payment.
B) Most plans use vesting (using pension plan money to reinvest in the company) to keep up with inflation, but the government does not insure against bankruptcy.
C) The majority of plans lack portability, and as workers change jobs much of their pension is lost.
D) Most plans are indexed to private savings and investments, and pay full pensions only to the poorest recipients.