thE ______ oF soCiAl sECurity BEnEFits oFtEn FEEl thAt thEy ArE ContriButing morE thAn thEy in FACt rECEivE in tErms oF mEDiCAl CArE, pEnsions, EtC.

A．rECEipts
B．rECEivErs
C．rECipiEnts
D．pAyEEs