Final answer:
A notary should acknowledge the grantor's signature. This is required in order to validate the document.
Step-by-step explanation:
A notary should acknowledge the grantor's signature when it comes to legal documents.
When a notary acknowledges a signature, it means that they have verified the identity of the person signing the document and have confirmed that the signature is genuine. This is typically done by the notary adding their own signature, seal, and other details to the document.
Therefore, the answer to the question is a. required. It is required for a notary to acknowledge the grantor's signature in order to validate the document.