I believe the answer is C. It would have the most economic effect.
Answer: Brokerage firm
Explanation:
A brokerage firm refers to financial institution that deal with the buying and selling of stocks and securities to individual investors. A brokerage firm acts as an intermediary between the buyers and sellers in order to facilitate transaction. They charge a transaction fee which can be in form of a flat fee or a percent of the amount of the transaction.
Tens of thousands of women joined The Women's Land Army to work the soil, fields, and orchards to free men for military service. Women took to the land gladly and brought in the harvest during the war years to supply food to the nation, the military, and our allies.