The correct answer is A) facts.
Claims must always be supported by evidence such as facts.
When making a claim do not forget to have the correct support of facts to be valid. If the claim is not supported by facts, then it is your opinion and cannot be valid as a formal claim. You have to get the facts that show that what you are saying is true and is well worth the claim. Otherwise, if you have no support, the claim is not going to proceed.
The other options of the question b) opinions, c) statistics, d) quotations e) example, and f) hypotheticals.