Ms. N, who is married, wants to file as head of household for the current year. Which of the following will prevent her from filing as head of household? B. A. She paid more than half the cost of keeping up her home for the tax year. Her spouse lived in her home for the final 6 months of the current year. She and her husband did not commingle funds for support purposes. Her home was, for more than 6 months of the year, the principal home of her son, whom she can claim as a dependent C. D