What Does Validation Imply in the Context of Persuasive Messages

What does validation imply in the context of persuasive messages?

A) Providing solid reasons for why your product, service, or idea really benefits readers
B) Demonstrating a business need-a gap between what is and what could be
C) Recognizing and appreciating others' needs and preferences as legitimate
D) Overcoming objections by providing counterpoints
E) Making a request and then providing a rationale for the request