Roger screams for help as he is being beaten up by a goon on a street. There are about 15 people standing nearby. However, none of the bystanders comes forward to help Roger. This scenario representing lack of help illustrates

“obamacare”: included a provision for government-run health insurance called “the public option.” was bitterly opposed by congressional republicans because most favored a “single-payer” plan. survived two challenges to its constitutionality. was partially repealed in 2013 in order to avert a government shutdown. led to the expansion of medicaid in republican controlled states.