A 72-year-old man with a history of hypertension and chronic kidney disease (stage 3) presents to his primary care physician complaining of a persistent dry, nonproductive cough that began approximately 3 weeks ago. He denies fever, chills, wheezing, shortness of breath, or recent upper respiratory infection. His blood pressure today is 148/92 mmHg, heart rate is 76 bpm, respiratory rate is 16 breaths per minute, and oxygen saturation is 98% on room air. Lung auscultation reveals clear breath sounds bilaterally with no wheezes or crackles. He has been taking lisinopril 10 mg daily for 2 years, which had previously provided adequate blood pressure control. His current serum creatinine is 2.1 mg/dL, slightly above his baseline of 1.9 mg/dL, and his potassium is 4.8 mEq/L. A chest radiograph shows no infiltrates or pulmonary edema. Which of the following best explains his cough?

1. A)Increased sympathetic nervous system activity
2. B)Direct stimulation of cough receptors in the bronchial epithelium
3. C)Worsening of chronic kidney disease causing uremic pneumonitis
4. D)Inhibition of angiotensin II-mediated bradykinin degradationGABARITO
5. E)Activation of renin-angiotensin-aldosterone system