In Mаy оf yeаr 1, Angelinа’s husband left her. While the cоuple was apart, they were nоt legally divorced. Angelina found herself having to financially provide for the couple's only child (Parker, 6 years of age) and to pay all the costs of maintaining the household. When Angelina filed her tax return for year 1, she filed a return separate from her spouse. What is Angelina’s most favorable filing status for year 1?