Captain Margaret Jones entered Afghanistan on December $1,2021.$ She remained there through March $31,2023,$ when she departed for the United States. She was not injured and did not return to the combat zone. What date is her $2023$ tax return due if she does not file Form $4868-$ Application for Automatic Extension of Time To File U$.$S$.$ Individual Income Tax Return?

A$.2022$Agnes Green was a single, calendar year taxpayer. She died on March $6,2023.$ Her final income tax return must be filed by which date $($not including weekends or holidays$)?$

A$.$ April $15,2023$

B$.$ January $1,2024$

C$.$ March $6,2024$

D$.$ April $15,2024$