Mason and his wife Madison have been married for five years. Jaxon, who is 18 years old and unrelated to Mason and Madison, has been living with Mason and Madison for the last two years. In May of year 1, Mason and Madison divorced. Mason and Jaxon stayed in the home and Madison moved out. During year 2, Mason provided all of Jaxon's support and Jaxon lived in the home for all of year 2. Jaxon did not earn any income during year 2. What is Mason's most favorable filing status for year 2?

A. Single

B. Married filing separately

C. Surviving spouse

D. Head of household