Why Are Government Welfare Programs Often Called Entitlement Programs

Why are government welfare programs often called entitlement programs?

A) Because every U.S. citizen, regardless of income, is entitled to receive benefits under these programs.
B) Because everyone living in the U.S., whether the person is a citizen or not, is entitled to a minimum level of income.
C) Because those who fail a means test  are eligible for cash assistance but not in-kind transfers.
D) Because people whose income is below a certain level are entitled to government assistance.