Final answer:
Uncontrolled hypertension refers to both untreated hypertension and hypertension that does not respond to medication, being answer C. It is important to manage hypertension to prevent serious health complications.
Step-by-step explanation:
Uncontrolled hypertension refers to both untreated hypertension and hypertension not responding to medication. Therefore, the correct answer is C. both A and B. Hypertension is a chronic condition characterized by chronically elevated blood pressure, typically defined as blood pressure measurements of 140/90 mm Hg or above. When hypertension is uncontrolled, it can lead to serious health issues such as heart attacks, strokes, aneurysms, peripheral arterial disease, and chronic kidney disease. This underscores the importance of proper treatment and management of hypertension to reduce the risk of cardiovascular diseases.