The answer is D. "The ways that regular exercise can improve your health"
Step-by-step explanation:
A presentation or text that has the purpose of predict is one that aims at foretelling or guessing the events that would happen in the future rather than explaining those that already occurred, events that are facts or those that represent an opinion; this implies, in predictions future consequences or events are explored usually based on a current event or a situation that leads to effects or consequences. Considering this, the presentation that has the purpose of predict is "The ways that regular exercise can improve your health" because this presentation deals with possible effects of exercise which have not been determined and therefore can be predicted or foretell. Also, other presentations such as "the life and times of Frederick Douglass", "the most popular careers in the year 2015" and "the reasons for voting against the new tax increase" deal with events that already occur or issues that cannot be predicted.