In order to protect a nation’s car manufacturing industry from foreign car producers, the government charges the importer a fee for each imported car. this is an example of what kind of trade barrier? tariff embargo subsidy quota

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