In an African Studies Research Paper That You Are Writing

In an African Studies research paper that you are writing for publication,you use the word "culture" to refer to a South African people.Which of the following is NOT a challenge to using this definition of culture to indicate "South Africans"?

A) Some South Africans have likely been exposed to ideas from many other countries,such as the United States and China.
B) Present-day South Africans are likely very different from South Africans in the early twentieth century.
C) All South Africans share the same political and environmental contexts,leading them to have very similar experiences.
D) There is too much variability within the South African population to warrant a single "South African" category.
E) South Africa is economically very similar to its neighbor,Botswana.