The lawsuit will be decided under Delaware law due to the contract's choice of law clause. The correct option is A.
Based on the information provided and standard legal principles, the lawsuit will ultimately be decided under Delaware law, because the companies agreed to resolve disputes under Delaware law in their contract. This is known as a choice of law or forum selection clause, which is commonly included in contracts to determine the governing law in the event of a dispute.
While federal courts do have jurisdiction over cases involving parties from different states, known as diversity of citizenship, they typically apply the state law chosen by the parties in the contract unless there is a specific federal interest at stake. The fact that the company filing suit is based in North Carolina is not necessarily determinative, as the contract's terms take precedence in deciding the applicable law.