I need help answering these questions. Can you all answer with explanations?

QUESTION 20 Jane, whose husband died in November 2019, maintains a household in which her dependent child lives. Which (if any) of the following is her filing status for the tax year 2020? (Note: Jane is the executor of her husband's estate.) O a. Single b. Married, filing separately c. Surviving spouse Od. Head of household QUESTION 21 If a tax deficiency is attributable to fraud, the negligence penalty will be imposed. True False QUESTION 22 In 2020, Ed is 66 and single. If he has itemized deductions of $12,700, he should not claim the standard deduction alternative, True False