This answer is strongly supported. We know that most people struggle to get rid of bad habits because it's hard to perceive the benefit. With a more vivid experience of the benefit, people would likely find it easier to get rid of bad habits.

This answer is anti-supported. The vivid, immediate pain of ceasing habitual behavior is what stops people from breaking habits, so this would just make it harder.

This answer is unsupported. The stimulus never indicates whether past success is a good predictor of future habit-breaking.

This answer is unsupported. The stimulus never suggests that it's easier to break habits that one is unaware of.

This answer is unsupported. The stimulus focuses on the pain caused by ceasing habitual behavior and the future benefit of breaking a bad habit. We just don't know how any pain caused by the habit plays in.