The most beneficial 2021 filing status for Marissa would be head of household. Option a.
The head of the household is one of the family members who is acknowledged as such by the other members of the unit, or by himself (or herself) if the person is living alone.
Simply keep track of the household bills, mortgage payments, property taxes, food, and other required expenditures you make to demonstrate this. You must secondly demonstrate that your dependent resided with you for the entire calendar year. The best ways to do this are through medical or school records.
Marissa is the head of the household because we are told that she was the one that took care of most of the bills in the household. She is said to have paid 100 percent of the bills of the family. Also Lucius is said to have passed as well
Read more on head of household here:https://brainly.com/question/21747089
#SPJ1