Answer:
It is frequently claimed that World War II contributed to the growth of big government in the United States. The public, moreover, it is said, had gotten use to higher taxes during the war, so it was not necessary for the government to lower taxes all the way to their prewar level.
A primary source is about somebody that witnessed an event or something
A secondary source comes from someone that heard that didn’t witness the event
For example the news is a secondary source and the person that was at the event is primary