When determining if a taxpayer qualifies for the Joint Custody Head of Household Credit, he or she must have kept up the taxpayer's home as a household that was the main home for the taxpayer's unmarried child, stepchild, or grandchild; or married child, stepchild, or child's descendant whom the taxpayer could claim as a dependent for at least how many days of the year

Which of the following is an example of a production quota? a. the government sets an upper limit on the quantity that each dairy farmer can produce. b. the government sets a price floor in the market for dairy products. c. the government sets a lower limit on the quantity that each dairy farmer can produce. d. the government guarantees to buy a specified quantity of dairy products from farmers.