Protectionism is the use of trade barriers to protect local companies and their workers from:
international unions
foreign competition
trademark infringements
patent violations
all of these

Protectionism is the use of trade barriers to protect local companies and their workers from foreign competition. Import tariffs, quotas, subsidies/tax cuts to local businesses and direct state interventions are some methods of Protectionism. This is where government actions and policies directly restrict or restrain international trade with the intention of protecting local businesses and jobs from foreign competitions.

Some critics argue that over time these types of government actions end up hurting people that they intend to help and protect. They promote free trade as an alternative and superior solution over protectionism.

If i remember correctly it was caused by people hurling bodies at a country for some reason and them they all became infected

It is c because it shows how the author is stating their own oppinion about the protagonist