6. Dacia is working out the terms of a contract to purchase Reed's paintings. Reed submits an offer in writing, which states that Dacia may have the first option to purchase each of his paintings within 30 days after completion, at $1,000 per painting. Dacia submits an offer in writing that indicates her acceptance, but stipulates that if she is unsatisfied with a painting after purchase, she may return the painting for a full refund within 10 days of delivery. Reed makes no objection. Dacia and Reed are considered merchants under the UCC. What is the result of these events?

A. No contract is formed, and Dacia's offer is a counteroffer.

B. No contract is formed, and Dacia's offer is treated as a rejection of Reed's offer.

C. A contract is formed, and Dacia's additional terms become part of the contract if they don't materially alter the contract.

D. A contract is formed, and Dacia's additional terms don't become part of the contract