Classify each of the following as either a country or a continent: Africa, North America, Asia, South America, Asia, China, Argentina, Canada, Mexico, Japan, United States of America

Africa is a continent.
North America is a continent.
Asia is a continent.
South America is a continent.
Asia is a continent.
China is a country in Asia.
Argentina is a country in South America.
Canada is a country in North America.
Mexico is a country in South America.
Japan is a country in Asia.
United States of America is a country in North America.