**Core Concept**
Struther's ligament is a fibrous structure that plays a crucial role in the formation of a potential space between two adjacent anatomical structures. It is a significant landmark in the neck, particularly in the context of thyroid and parathyroid surgery.

**Why the Correct Answer is Right**
Struther's ligament is a fibrous band that connects the inferior pharyngeal constrictor muscle to the prevertebral fascia. This ligament is significant because it can compress the superior thyroid artery and vein, which can lead to complications during thyroid surgery. The compression of these vital structures can potentially compromise the blood supply to the thyroid gland, leading to postoperative bleeding or even thyroid necrosis.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because Struther's ligament is not associated with the recurrent laryngeal nerve, which is a critical structure in the neck that can be at risk during thyroid surgery.
* **Option B:** This option is incorrect because Struther's ligament is not a term used to describe the omohyoid muscle or its ligaments.
* **Option C:** This option is incorrect because Struther's ligament is not a term used to describe the superior laryngeal nerve or its ligaments.

**Clinical Pearl / High-Yield Fact**
Struther's ligament is a potential source of bleeding during thyroid surgery, and its identification and management are crucial to prevent postoperative complications.

**Correct Answer: D. Struther's ligament.**