An 84-Year-Old Man Complains of Generalized Weakness and an Ache

An 84-year-old man complains of generalized weakness and an ache in his left shoulder. He also reports mild shortness of breath and has clear lung sounds and an SpO₂ of 96%. When asked, he claims that the discomfort started after getting out of bed two hours ago. He denies any known injury to his shoulder or back. He has a history of coronary artery disease, hypertension, TIA, and dementia. Your differential diagnosis for this patient should include:

A) aortic dissection, pulmonary embolism, and myocardial infarction.
B) myocardial infarction, stroke, and musculoskeletal trauma.
C) trauma, pulmonary embolism, and pneumonia.
D) COPD, stroke, and medication overdose.