In a park, a guy you do not know sits near you. his mere presence affects your behavior even though he is doing nothing. in the context of social facilitation, this person is best described as a(n)

“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 was partially repealed in 2013 in order to avert a government shutdown.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.