**Core Concept**
The supraspinatus muscle is one of the four rotator cuff muscles responsible for shoulder stability and movement. Specifically, it plays a crucial role in the initiation of arm abduction, especially in the first 15-30 degrees of movement.

**Why the Correct Answer is Right**
The supraspinatus muscle originates from the supraspinous fossa of the scapula and inserts onto the superior facet of the greater tubercle of the humerus. When injured, the supraspinatus tendon can lead to weakness or loss of function in arm abduction, making it difficult or impossible to perform this movement. This is because the supraspinatus muscle is responsible for stabilizing the humeral head in the glenoid cavity and assists in the initiation of abduction by contracting and pulling the humerus upward.

**Why Each Wrong Option is Incorrect**
**Option A:** Frozen shoulder, also known as adhesive capsulitis, is a condition characterized by pain and stiffness in the shoulder joint, but it is not directly related to supraspinatus muscle injury.
**Option B:** Winging of the scapula is typically associated with weakness or paralysis of the serratus anterior muscle, not the supraspinatus muscle.
**Option D:** Adduction is primarily performed by the adductor muscles of the arm, such as the latissimus dorsi and teres major, and is not directly affected by supraspinatus muscle injury.

**Clinical Pearl / High-Yield Fact**
When assessing shoulder injuries, it's essential to remember that the supraspinatus muscle is often the first to be affected in rotator cuff injuries, and its dysfunction can lead to weakness in arm abduction. This is why patients with supraspinatus injuries often complain of difficulty lifting their arm or performing overhead activities.

**✓ Correct Answer: C. Cannot abduct**