4. I don't like turbulence (measured in bumps). However, each additional bump isn't as bad as the last bump. I don't like running when I first start to run, but each additional mile isn't as bad as the last mile. Once I run long enough, I start to like running and each additional mile is even better than the last. Which of the following could represent my indifference curve for running and turbulence? For each graph assume turbulence is on the horizontal axis and running is on the vertical axis. Graph A Graph B Graph C Graph D a. Graph A b. Graph B c. Graph C d. Graph D (See Preferences Practice Problem #1.)