Probably the Greatest Long-Term Threat to the Viability of the Social

Probably the greatest long-term threat to the viability of the Social Security system is the

A) pending retirement of baby boomers.
B) dramatic increase in health care costs.
C) declining political clout of senior citizens.
D) number of current workers choosing not to participate.
E) declining value of the Treasury bonds in which the Social Security trust fund is invested.