What was the key purpose of the market days in philadelphia?

To provide goods to people with more safety and sanity.

Explanation:

Actually, the initial reason of that market was safety and sanity. Nowadays they still are operating but with less merchants. They offer some goods for people in general like fresh meats, fish, artisan cheese, groceries, flowers, grilled cheese, baked goods, crafts, books, clothing, and specialty and ethnic foods.

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.

c. businesses/firms & government