In a "mixed contract." one involving a sale of both goods and services, the court will: A Apply the UCC to the provisions of the contract involving the sale of goods and the common law to the provisions involving the sale of services. B. Apply the lex mercatoria to the contract. First determine the dominant purpose of the contract. If the sale of goods dominates the contract then the court will apply the law of the UCC Article 2. the sale of services dominates the contract, the court will apply the common law. D. Apply UCC Article 2A QUESTION 5 3 points ABC Siding, Inc. manufactures aluminum siding. ABC enters into a contract to deliver siding to Slippery Siding Ltd. a retailer of aluminum siding. The written agreement insists that all modifications to the agreement be in writing and signed by both parties. This prohibition against oral modifications is: A Valid regardless of whether the cause is signed separately. B. Invalid unless the cause is signed separately by Slopery Siding Ltd. Invalid unless the clause is signed separately by ABC Siding, Inc. ABC Siding, Inc. manufactures aluminum siding. ABC enters into a contract to deliver siding to Slippery Siding, Ltd., a retailer of aluminum siding. The written agreement insists that all modifications to the agreement be in writing and signed by both parties. This prohibition against oral modifications is: O A Valid regardless of whether the clause is signed separately. B. Invalid unless the clause is signed separately by Slippery Siding, Ltd. C. Invalid unless the clause is signed separately by ABC Siding, Inc. D. Invalid unless new consideration is supplied by the parties when the modification agreement is made