What Is the Long-Term Concern About the Social Security Trust

What is the long-term concern about the Social Security Trust Fund?

A) The rate of Social Security payroll taxes will continue to decrease.
B) The number of current retirees contributing to the fund will continue to decrease.
C) The working poor will not have access to Social Security medical benefits.
D) There will be too few workers contributing to support the increasing number of retirees.