Final answer:
The parol evidence rule does not apply to contract modifications that are made after the original contract has been executed. Amelia and Schwinn's oral agreement to modify the work arrangement and compensation falls outside the scope of the parol evidence rule. Hence, the correct option is D.
Step-by-step explanation:
The question pertains to the parol evidence rule, a legal doctrine in contract law that determines the admissibility of external evidence to explain, vary, or add to the terms of a written contract. Based on the scenario provided, Amelia has an existing contract and a subsequent oral agreement to change her working conditions and compensation. The parol evidence rule generally prohibits the introduction of evidence of prior or contemporaneous negotiations and agreements that contradict, modify, or vary contractual terms if the written contract is intended to be a complete and final expression of the parties' agreement.
However, the parol evidence rule does not apply to subsequent modifications of a contract if such modifications are agreed upon after the contract has been executed. Since Amelia and Schwinn have agreed to modify the terms after the contract began, the parol evidence rule would not apply to this subsequent modification. Therefore, the correct option in this scenario is D. The parol evidence rule does not apply to contract modifications.