Which statement would be MOST important to include in a summary of the article?

A:Giving people cash when they go to the gym makes them exercise more frequently.

B:"Mulligan" groups are more likely to follow through with their habits than groups without a mulligan.

C:Research shows that there are specific strategies that can help people start new habits.

D:Piggybacking a new habit with an enjoyable activity can help create a new habit.