PMI Exam PMI-RMP Topic 2 Question 49 Discussion

Mary is the project manager of the HGH Project for her company. She and her project team have agreed that if the vendor is late by more than ten days they will cancel the order and hire the NBG Company to fulfill the order. The NBG Company can guarantee orders within three days, but the costs of their products are significantly more expensive than the current vendor. What type of a response strategy is this?