This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
A patient with a history of ankle edema, shortness of breath and orthopnea, is probably suffering from: 
Select and explain. 
A. Asthma, B. Emphysema, C. Cardiac decompensation, D. Constrictive pericarditis
C: Cardiac decompensation
Answer: C: Cardiac decompensation 
Explanation: None