It Is Hard to See the Long-Term Debt Obligations Stemming

It is hard to see the long-term debt obligations stemming from health care and Social Security because

A) we do not know how many people will qualify for these payments.
B) these expenses were budgeted and paid out during the year in which the recipients contributed their taxes.
C) these expenses are budgeted and paid out during the year in which the costs are incurred.
D) these expenses never show up in the budget.