Which of the following is a common symptom of an AVM?

The option indicating varicose veins as a common symptom of an arteriovenous malformation (AVM) is correct because AVMs can disrupt normal blood flow and lead to increased venous pressure in surrounding tissues. When this happens, it can cause the veins to become enlarged and twisted, leading to the appearance of varicose veins.

While shortness of breath, high blood pressure, and chest pain can be associated with various vascular conditions or other cardiovascular problems, they are not commonly identified as primary symptoms of AVMs. AVMs typically manifest more visibly through changes such as varicosities, especially in areas where they occur near the surface of the skin, leading to observable symptoms. Thus, the relationship between AVMs and varicose veins makes this option the most appropriate answer in the context of symptoms.