Two hours before a client's scheduled surgery, the nurse is completing the preoperative checklist. Which information requires immediate action by the nurse?

Choice A reason: While the chest x-ray report is important, it is not as immediately critical as a low potassium level.Choice B reason: The surgical consent form is important but can be addressed quickly before surgery.Choice C reason:The correct answer is c) because a preoperative serum potassium level of 2.8 mEq/L is dangerously low and requires immediate correction to avoid cardiac complications during surgery.Choice D reason: A pulse oximeter reading of 96% is within normal limits and does not require immediate action.