Programs Like Social Security Are Referred to as "Entitlement Programs

Programs like Social Security are referred to as "entitlement programs" because:

A) people who receive benefits under the programs have repeatedly acted like they are owed monies by the government.
B) the people who use the term think Social Security beneficiaries are fully deserving of them.
C) they guarantee-that is, entitle-benefits to certain groups of people, based on categories established by federal law.
D) people often sue to receive them, showing that they feel entitled to the monies.