question: Q:A 70-year-old male with a 10-year history of COPD visits his pulmonologist for a checkup. Physical examination reveals cyanosis, digital clubbing, and bilateral lung wheezes are heard upon auscultation. The patient has a cough productive of thick yellow sputum. Which of the following findings is most likely present in this patient?? 
  {'A': 'Decreased arterial carbon dioxide content', 'B': 'Increased pulmonary arterial resistance', 'C': 'Increased pH of the arterial blood', 'D': 'Increased cerebral vascular resistance', 'E': 'Increased right ventricle compliance'},