In an African Studies Research Paper That You Are Writing

In an African Studies research paper that you are writing for publication,you used 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 20th century.
C) Many South Africans themselves do not know what it really means to be South African,or what that term entails.
D) There is too much variability within the South African population to warrant a single "South African" category.
E) Many South Africans have likely traveled beyond their national borders and have been introduced to messages from foreign cultures.