Don and Joy married five years ago when they were both 17 years old. Since then, they have filed joint returns for the last four tax years. Don was the primary taxpayer on the returns, and they have no dependents. They realized they had used bad judgment and obtained a decree of annulment holding that no valid marriage ever existed on December 31 of the current tax year. For the current tax year, is each taxpayer considered married or unmarried? What is their filing status? Also, what, if anything, are these taxpayers required to do to address the last four tax years' returns? Question 1Select one: a. Both taxpayers are considered married for the current tax year; each must file either jointly or separately. There are no requirements for the last four tax years. b. Both taxpayers are considered unmarried for the current tax year; each must use the Single filing status. There are no requirements for the last four tax years. c. Both taxpayers are considered unmarried for the current tax year; each must use the Single filing status. Don must amend the joint returns for the last four tax years to change his filing status to Single and