Jozmell, Christina, Jordan, and Melissa have been assigned a group project for a class. During the three weeks in which they developed and completed the project, Jozmell, Christina, and Jordan did most of the work. Melissa missed meetings, turned in inferior summaries of her assigned readings, and was quiet during brainstorming sessions. On the day of the project presentation, Melissa did a good job of delivering her part of the presentation. What can BEST explain Melissa's sudden burst of good work during her portion of the graded presentation