Q-728.2. As she analyzes a stock, Barbara contemplates a straddle because she wants to express her view that there will be a big change in the stock price, either dramatically up or down, but she is uncertain as to the direction. In this way, she wants an option combination strategy that is "long volatility." However, the straddle is more expensive than she anticipated. Which of the following will allow her to generally express her "long volatility" view (giving her the potential for a large, or even uncapped, payoff in the event of a dramatic price move) but with a cost that is REDUCED in comparison to the straddle?