A patient is referred to physical therapy with a diagnosis of right thoracic outlet syndrome. The physical therapist identifies that the patient's symptoms are being caused by entrapment at the costoclavicular space. Which of the following activities would MOST likely exacerbate the patient's symptoms?

1. Reaching overhead into a high cupboard

2. Carrying a heavy bag in the right arm

3. Looking over the left shoulder while driving

4. Looking upward to shave the neck

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