The most likely cause of the patient's current symptoms, including progressive weakness, decreased exercise tolerance, left pleural effusion, dizziness, sweating, low systolic blood pressure (SBP), and rapid heart rate (HR), after thoracentesis and findings of dullness to percussion with no breath sounds on the left side of the chest, is:
a) Tension pneumothorax
b) Pulmonary embolism
c) Acute myocardial infarction
d) Atelectasis