You walk into a casino with a roulette wheel. The wheel has 40 slots on it: 19 are black, 19 are red, and 2 are green. The required bet is $5. After a bet is placed, you can choose to place your wager on black, red, or green. A winning bet on black pays $10, a winning bet on red pays $10, and a winning bet on green pays $110. Your friend Ripley goes with you to the casino, and she tells you that she needs your help in deciding on which color to bet on. She tells you that she wants to bet on the color with the highest expected value. Which color should she bet on? A bet on black A bet on red A bet on green O They are all the same, and she shouldn't bet at all