A development team is building a system that generates three potential email subject lines for a marketing campaign. A separate component then ranks these three options to select the most effective one. The team observes that the generated subject lines are consistently too similar, for example: 'Don't Miss Our Big Sale!', 'Our Big Sale is Happening Now!', and 'Check Out Our Big Sale!'. This lack of meaningful variation limits the utility of the ranking component. Propose two distinct, practical strategies the team could implement to generate a more diverse set of initial subject lines. For each strategy, briefly explain the reasoning behind why it would be effective.