In Nigeria, people can open their own business, choose their careers and job paths, and can purchase a wide variety of goods. However, the national government places tariffs on imported goods, they have a significant share in the oil industry and they regulate much of the country's industry. Based on this description, Nigeria could BEST be categorized as which type of economy?

Nigeria would be best categorized as a mixed economy.

Explanation:

A mixed economy is a system in which a country allows economic freedom and defends private property, but it also permits governmental interference in certain areas with the purpose of assisting in social matters. In a way, a mixed economy puts together characteristics of capitalism as well as socialism, or of market economies and planned economies. From the description in the question, we can easily conclude Nigeria is a mixed economy.

  b.

there are isolated pockets of farming, generally around rivers and oases, which are used for irrigation.

i think it is the third one.