Final answer:
Inflammation of blood vessels, known as vasculitis, is a potentially dangerous condition that may cause serious complications.
Step-by-step explanation:
The correct answer is B) Inflammation of blood vessels.
When blood vessels become inflamed, it is known as vasculitis. This condition can lead to serious complications if not treated properly. It can cause damage to the blood vessels, leading to reduced blood flow, and in severe cases, it can result in the rupture of blood vessels. Inflammation of blood vessels is a potentially dangerous condition that requires medical attention.