Which document could become part of the agreement once signed by all parties?

• A. Field order
• B. Construction contract
• C. Change order request
• D. Addenda

Answer: (D)

Addenda are documents that modify, clarify, or add details to the contract. When all parties sign an addendum, it becomes part of the contract documents and has the same enforceable effect as the original agreement. This is why it could become part of the agreement once signed. Field orders and change order requests relate to changes during the project and typically require a separate change order process to be integrated, while the construction contract itself is the agreement rather than something that would be added to it.