The united states has a federal system of government because

Reasoning based on the ease with which we can bring something to mind involves the use of the heuristic

Me asap worth brainlieist and 50 points

Mrs. walter’s husband died in 2016. she has not remarried and has maintained a home for herself and her dependent son, whom she can claim as a dependent. in the summer of 2018, the son was killed in an automobile accident. what is mrs. walter’s filing status for 2018