Final answer:
A physical therapist assessing a patient's right shoulder functionality is likely to have them stand facing the observer with arms extended at a ninety-degree angle from the torso, which facilitates observation and range of motion assessment.
Step-by-step explanation:
To examine a patient's right shoulder, the physical therapist would likely position the patient to allow for optimal visibility and access to the shoulder joint. Given the movements involved in assessing a range of motion—abduction, adduction, circumduction, and flexion/extension—the most suitable position would be with the person standing facing the observer, with the upper limbs extended out at a ninety-degree angle from the torso (option b). This position facilitates the assessment of shoulder functionality and helps the physical therapist in creating an appropriate treatment plan. The patient's stance would allow the therapist to observe and measure the degree of function of the shoulder joint effectively.