$3)$ Congress initially intended for the Medicaid program to provide basic safety net coverage for certain vulnerable populations, including which of the following? $($Select all that apply$)$

a$)$ Single, pregnant women with or without dependents

b$)$ Single men with dependents

c$)$ Working age adults without dependents

d$)$ Children in low$-$income households

e$)$ Disabled individuals less than $65$