The Aging of the American Population Has Brought to the Forefront

The aging of the American population has brought to the forefront of the nation the concern that social security is no longer a viable option for future retirees and that the financial viability of the system depends on:

A) how much each retiree has contributed over his or her lifetime to his or her individual social security account.
B) the ratio of those working to those retired.
C) the ratio of the total earning of an individual over his lifetime to the number of his service years.
D) the interest rate in effect at the time a contributor first began to contribute to his or her individual social security account.
E) the interest rate in effect over the entire course of time that a contributor has paid into the fund.