Final answer:
The best course of action for the patient in question is to administer a bronchodilator to relieve bronchoconstriction, as this would directly address the narrowing of the airways that is likely causing the increased respiratory distress.
Step-by-step explanation:
The best course of action for a 55-year-old man with a history of chronic bronchitis who is experiencing increased respiratory distress would likely be B) Administer a bronchodilator to relieve bronchoconstriction. The patient's symptoms, such as difficulty speaking due to shortness of breath, suggest an exacerbation of his chronic bronchitis, potentially leading to a further narrowed airway. A bronchodilator would help to relax the muscles around the airways, making it easier for the patient to breathe. Increasing the oxygen flow without addressing the bronchoconstriction (option A and C) may not sufficiently improve his clinical situation. Having the patient lie down (option D) may actually worsen his breathing effort, as a forward-leaning position can aid in breathing when experiencing respiratory difficulty.