Beth really wants to get in shape,but just can't seem to ever get herself to the gym.An example of a commitment device Beth could use would be:

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Option C provides a commitment device because it involves making arrangements with another person to meet at the gym each day. This creates a sense of accountability and makes it more difficult for Beth to skip the gym. Option A may be helpful in reminding Beth to go to the gym, but it doesn't necessarily create the same sense of accountability or consequences for skipping. Option B may actually work against Beth's goal of getting in shape, as it reinforces an unhealthy behavior (indulging in dessert) rather than promoting healthy habits. Option D doesn't offer any commitment device at all.

Beth Really Wants to Get in Shape,but Just Can't Seem