Which of the following is FALSE?
a. the estimated cost of unfunded liabilities is about 20 times the size of the current national debt b. the shortfall between future social insurance tax revenues and future payments to Social Security and Medicare is accounted for in the national debt
c. all of these options are correct
d. promises to pay Social Security benefits for future retirees are not counted in the national debt e. the size of the national debt would be lower if one counted government asset holdings