People in the coverage gap are those who still lack insurance coverage after the ACA because they _________. a. have incomes below 100% FPL and are not eligible for Medicaid in their state b. have incomes above 400% FPL so are not eligible for subsidies to buy insurance from the marketplace c. have coverage through the marketplace but want to see a doctor that doesn't participate in any marketplace plan. d. aren't offered insurance at work