Answer:
D: Disprove counterclaims.
Step-by-step explanation:
Evidence refers to anything presented - a document, a witness testimony, tangible things, etc.- that supports a claim, a belief or a proposition or disproves them. Therefore, when an author uses conflicting evidence in an argument, that is to say, a piece of evidence that is contrary to another already presented, their aim is to disprove a previous claim (a counterclaim).