Which of the following best defines "scarcity"?
a. insufficient amounts of resources to meet the demand
b. low demand
c. lack of consumer interest
d. government regulation of currency

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 was partially repealed in 2013 in order to avert a government shutdown.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