Final answer:
A builder is required to deliver all agreements, plans, and specs to their customer, including blueprints and sales agreements to ensure clarity and understanding of the project expectations.
Step-by-step explanation:
The question pertains to the deliverables that a builder is required to provide to their customer. In the context of construction and contractual obligations, the most comprehensive and correct answer is C) all agreements, plans, and specs. These documents encompass the detailed blueprints of the construction project, the sales agreement delineating the terms of the sale, and any additional agreements that might regulate the relationship between the builder and the customer. Delivering this full suite of documents ensures that both parties have a clear understanding of the expectations and specifications for the project.