Concept:The withdrawal was a diplomatic protest by Nigeria against British policy toward apartheid South Africa.
Explanation:In July 1986, Nigeria boycotted the Commonwealth Games held in Edinburgh, United Kingdom.
The Nigerian government acted because Britain refused to impose economic and political sanctions on the apartheid regime in South Africa.
This refusal was seen as supporting white minority rule in South Africa.
Thus, the protest was not about Rhodesia, UNITA, or personal remarks against Nigeria.
Answer:B. failure to impose sanctions on South Africa.