By percent, how much greater do sales of horror books appear to be than sales of cookbooks? How much greater are they in reality? a. There appear to be 50% more sales of horror books than cookbooks, but there are really only about 20% more. b. There appear to be 40% more sales of horror books than cookbooks, but there are really only about 5% more. c. There appear to be 20% more sales of horror books than cookbooks, but there are really only about 10% more. d. There appear to be 25% more sales of horror books than cookbooks, but there are really only about 2% more.