A student sleeps 8 hours per day and divides the remaining time between study time and leisure time. The table shows the combinations of study and leisure time that can be produced in the 16 waking hours of each day. Suppose the student completes a speed-reading course that allows him to do the same amount of studying in half as many hours. Which of the following is now true of his opportunity costs?
A. There is no change in the opportunity costs. B. The opportunity cost of leisure has increased.
C. The opportunity cost of studying has increased. D. The opportunity cost of leisure has decreased