Answer:
Diary or personal account that was written during the time of the event, etc.
Explanation:
Without a set of options in front of me, my best guess would be something along the lines of my above answer. Primary sources are typically diaries, legal codes, and other firsthand accounts/sources of information. They typically provide the most accurate account of the event that occurred because they have not been interpreted further by any other people.
Because the price of Bread skyrocketed.
The passage of the GI Bill changed American cities and towns in that it gave returning veterans more economic opportunities, which allowed them to leave the cities.
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