Answer: C
Step-by-step explanation:
The go-to answer here is C. Evidence is considered sufficient when it provides enough information to support a claim. So, it's like having the goods – facts, data, or whatever you need – to back up what you're saying. Personal opinions (A) can be shaky ground, and reliable sources (B) are crucial, but the key is that the evidence actually supports the claim (C).
As for D, if it's not on the same topic as the claim, it might not be directly relevant, so it wouldn't be sufficient in that context.