Rutgers issues you an RUID card when you enroll. Suppose technology existed so that you would swipe your ID card when you entered an exam room and an exam with a unique barcode is scanned and issued to you. You swipe the ID card again when you leave the exam room and the exam barcode is again scanned. Each swipe and scan collects and stores the following information: time of swipe, student name, student RUID number, the unique barcode of the exam issued to (or returned by) the student whose card was swiped. Assuming that no student is permitted to leave the exam room before they complete the exam and that each student works on the exam the entire time they are in the exam room and leaves the exam room immediately upon completion of the exam, which of the following could be determined using the information collected and only this information? a. the student or students scoring the highest grade on the exam b. the number of students taking less than one hour to complete the exam c. the amount of time the exam issued to you was in your possession d. whether or not a student answered all of the questions on the exam