How does knowing the half life of carbon14 tell scientists the absolute age of a rock sample?

It is the second answer

Answermost of the time it would be ground into fine sediment,and sometimes they are carried away from the original location;

Africans learned what the europeans wanted them to learn. instead of learning about african history and current information that could and would them they learned solely what europe wanted them to. and not everyone received the same education, some received better and others none.

Ithink the answer  is d. tourism.hope this ☺☺