To determine the answer to this question, we can analyze the information provided and consider historical context.
The image shows a sign with English at the top and Afrikaans at the bottom. Afrikaans is a language predominantly used by white South Africans, indicating a preference for the language of the minority population. This imagery suggests that under the apartheid government, there was a policy of promoting the interests of the white Afrikaner population.
With this evidence, we can conclude that the correct answer is D. Racial discrimination was enforced by law under the apartheid government in South Africa. This system implemented a strict segregation of races and aimed to ensure the dominance of the white minority over the majority black population.