An investor is very confident that a stock will change significantly over the next few months; however, the direction of the price changes is unknown. Which pair of strategies is most likely to produce a profit if the stock price moves as expected? 1. Short butterfly spread 2. Bearish calendar spread 3. Long at-the-money straddle 4. Short strangle 2 and 3 1 and 4 2 and 4 1 and 3