The answer is A: the time,place and condition in which a story occurs
In case anyone needs extra confirmation, the correct answer is indeed:
"It helps convey the idea that, during apartheid, many South Africans who disapproved of their government's racist policies did not trust the police to follow the law or to be honest about their actions."
Just took the test and got this right :)
The main source of tension is how Chet is laticia
Noun i would say
hope it helps