What is the basis for the income level that the U.S. government uses as the poverty line? Question 6 options: a) the income line that separates the bottom quintile from the second quintile of earners b) the average household income of the lowest-paid 15% of households c) the value of low-cost rent, food, transportation, and medical care annually for the family size d) the value of a low-cost food plan multiplied by three, updated annually for inflation