Julie and her husband, Vern, were married at the beginning of 2023. They separated on June 5, 2023, and Vern moved out of the house at that time. Their son, Cam (9), lived with Julie all year. Julie paid more than half of the total cost of keeping up the home in 2023. Julie and Vern's divorce was finalized on January 3, 2023. Julie does not wish to file a joint return with Vern. What is Julie's most advantageous filing status and standard deduction?

Married filing separately; $13,850.

Single; $13,850.

Head of household; $20,800.

Qualifying surviving spouse; $27,700.