Darrell (46) is unmarried. His mother, Marlene (81), lives in a nursing home. Darrell pays the entire cost of the nursing home and more than 50% of Marlene's total support. Darrell's wages were $77,000; Marlene's income consisted of $1,800 taxable interest and $9,600 social security benefits. VWhat is Darrell's correct and most favorable 2019 filing status?

1. Single.

2. Married filing jointly.

3. Married filing separately.

4. Head of household.

5. Qualifying widow(er).