The methods of handling businesses and industries that conduct business around the world is known as A. socialism. B. migration. C. globalization. D. privatization.

It's not socialism as it's a particular economical system (different from capitalism for example).

It's also not migration, as it's the process of people moving from one place to another.

It's also not privatization as it's the selling of government companies to private people.

The correct answer is globalisation!