Answer:
The Commission is a federal agency that regulates the stock system.
Explanation:
Answer: a. Social issues
A photojournalist is a visual storyteller whose main roles are to photograph, edit, and present images in a way that their artworks tell people a story. He must be able to set up the photo for top quality, edit it without trace that it was changed, and upload it on the Internet for publication.
His subjects vary greatly, but he usually concentrates on social issues.
It's B. The Columbian Exchange is just that, the exchange of goods, plants, people, etc. between Europe and the Americas