Final answer:
A ruptured aortic aneurysm is the cardiovascular condition on the list most likely to cause abdominal pain, due to the weakening and subsequent expansion of the aorta which, if ruptures, leads to severe symptoms.
Step-by-step explanation:
Among the cardiovascular conditions listed, a ruptured aortic aneurysm (C) is most likely to cause abdominal pain. Aortic aneurysms are expansions of the aorta caused by the weakening of the artery wall, often due to conditions such as atherosclerosis. If an aortic aneurysm ruptures, it is a medical emergency and can cause severe abdominal pain, along with other symptoms like a pulsating sensation near the navel, dizziness, and shock. Hypertension (A) and coronary artery disease (B) typically present symptoms related to the heart and circulatory system, and while they can be serious, they generally do not cause abdominal pain. Atrial fibrillation (D) is associated with irregular heartbeats and does not typically result in abdominal pain.