Final answer:
A notary must verify the identity of the requester, ensure the copy is accurate, and place a certification stamp on it when performing copy certification.
Step-by-step explanation:
When performing a copy certification, a notary must verify the identity of the person making the copy, ensure that the copy is a true and accurate reproduction of the original document, and place a certification stamp or seal on the copy. Hence, the correct answer is 4) All of the above. The process of copy certification is designed to create a trusted record that the copy presented is a true reflection of the original document. It's important for the integrity of document handling that this process is taken seriously and performed thoroughly.