One Proposal for Solving the Social Security Problem Is Privatization

One proposal for solving the social security problem is privatization.This means:

A) refusing to provide retirement benefits,thereby forcing people to use private savings.
B) providing retirement benefits only to those who had worked for a private firm.
C) providing retirement benefits only to those who also save privately.
D) allowing participants to choose how their tax funds are to be invested.
E) preventing participants from paying taxes on their retirement income.