The answer is A. Fossils have been found by the local science club. Since the verb, found, is being done to the subject, fossils, it is in the passive voice. The others are in the active voice since the action is being done by the subject.
An 18th century literally genre which celebrates emotional and intellectual concepts!!
I find all of the answers pretty neutral (that is, giving only facts, no judgements) except on sentence 3: this is because of the word "sharply".
It seems that the author of this sentence makes a judgement about the split: that they're very split, that their argument was very intense. It seems like a judgement to me more than the other sentences.
