To determine if the Obamacare subsidy achieves an efficient outcome, we would need to know _______. Question content area bottom Part 1 To determine if the Obamacare subsidy achieves an efficient outcome, we would need to know _______. A. the amount by which the marginal social benefit of insurance exceeds the ability and willingness of people to pay for it B. how many families signed up for Obamacare and how quickly this number is growing C. the amount by which the marginal social benefit of insurance exceeds its marginal social cost D. the number of families that transferred from Medicaid to Obamacare