Answer:
2 or 3.
Explanation:
Lucile´s dependent husband passed away in January of 2019. She does not remarry and still maintains a residence for herself and her son who is 10 years old. When she is filing her 2019 tax return she may file as Married filing jointly or Married filing separately.
Lucille is considered married for the full year since she was married and her spouse died during the year and she did not remarry.
