Of the Following Activities, Which Is the Most Appropriate Choice

Of the following activities, which is the most appropriate choice for developing stability of the scapulothoracic joint?

A) While in the supine position, have the patient perform repeated concentric contractions of the scapular protractors against manual resistance applied to the anterior aspect of the shoulder.
B) While standing, have the patient place the arms in a reverse-T position while holding a piece of elastic tubing between the hands.Then have the patient attempt to "pinch the shoulder blades together" repeatedly against the elastic resistance.
C) Have the patient stand, face a wall, place the hands on the wall, and lean into the wall as the therapist applies alternating resistance against the shoulders.
D) Have the patient hold the arms in various positions in space (perform isometric contractions) as the therapist applies resistance in various directions.