Which of the following taxpayers are required to file a tax return in 2022: Question 5 options: A. A married couple who files jointly, both spouses are 45 years old and their combined income is $21,000 B. A married couple who files jointly, both spouses are 65 years old and their combined income is $21,000 C. Both of these married couples are required to file an income tax return D. Neither of these married couples are required to file an income tax return