Answer:
A. an assumption
It's either A or D but i would go with A because a claim is something that the author is stating, which is usually in an essay
Step-by-step explanation:
Assumption: a thing that is accepted as true or as certain to happen, without proof
Evidence: the available body of facts or information indicating whether a belief or proposition is true or valid
Anecdote: a short amusing or interesting story about a real incident or person
Claim: state or assert that something is the case, typically without providing evidence or proof