**Core Concept**
The question is testing the knowledge of a specific type of food allergy, also known as a seafood allergy, which is an overreaction of the immune system to certain proteins present in seafood. This condition is characterized by the release of histamine and other chemical mediators, leading to symptoms such as rashes, itching, and difficulty breathing.

**Why the Correct Answer is Right**
The correct answer is related to the IgE-mediated hypersensitivity reaction, which is a type of immune response that occurs when the body mistakenly identifies a harmless substance, such as a protein in seafood, as a threat. This leads to the production of IgE antibodies, which bind to mast cells and basophils, causing them to release histamine and other chemical mediators. The histamine then binds to H1 receptors on smooth muscle cells, leading to increased permeability of blood vessels and the characteristic symptoms of a seafood allergy.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify the mechanism of the reaction. While it may be a plausible answer, it lacks the detail required to understand the underlying pathophysiology.
**Option B:** This option is incorrect because it refers to a different type of food allergy, which is not related to seafood.
**Option C:** This option is incorrect because it is a treatment for a seafood allergy, rather than the underlying cause.

**Clinical Pearl / High-Yield Fact**
A seafood allergy is a common cause of anaphylaxis, a life-threatening allergic reaction that requires immediate medical attention. Individuals who experience symptoms of a seafood allergy should carry an EpiPen or other emergency medication with them at all times.

**Correct Answer:** D. Urticaria (hives) and rashes are common symptoms of a seafood allergy, which is often referred to as urticaria.