I need to see the question before I can respond to the question. The Simulator is the best place to ask questions concerning specific Exam Simulator questions. This can be done while reviewing the questions and answers from finished exams that you've taken already. Once you submit a question using this option a Moderator will be able to answer you and look at the specific question at hand.
As for your question, if the PM just finished crashing the schedule I would assume that the need to crash the schedule has already been discussed with stakeholders and the change request has already been formally submitted and approved. However, I can't be certain unless I read the question and review the available answers. Regardless, if I just found out my project's SPI changed I would work on assessing and analyzing the schedule change to determine whether or not it is favorable. I would then update the project schedule accordingly and plan my next steps depending on the updates. Were any of these steps a possibility to choose from for the question at hand?