This question is about understanding the implication of the word 'literally' in the given context. The correct answer is B. It was accidental because 'literally' suggests that the discovery of the early hominid site was made by chance while the butterfly hunter was doing something else. Option A is incorrect because 'literally' does not imply planning. Option C is wrong because 'literally' does not suggest expectation. Option D is incorrect because 'literally' does not imply delay.