It might be four, because all three of them are apart of the axis powers.
Answer:
Primary source
In the study of history as an academic discipline, a primary source is an artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time under study. It serves as an original source of information about the topic.
The answer to your question is D because cell phones & the Internet are both forms of instant communication.
The Apartheid government of South Africa resulted in the forced removal of 3.5 million black South Africans between 1960 and 1986. This all white government made legal segregation possible in South Africa. This forced millions of individuals to move and started segregated public facilities. During this era, there was very little contact between white and black South Africans.