Sandra's (57) husband, Ben, died in 2017, and she has not remarried. Sandra's mother, Dorothy, lives in a nursing home. Dorothy's only income for 2019 consisted of $17.650 in social security benefits. Sandra pays the entire cost of the nursing home and more than 50% of Dorothy's support. Sandra does not have any children, and no one else lives with her. What is Sandra's correct and most favorable filing status? Head of household, Married fling jointly Qualifying widow. Single