A. Coughing, choking, gagging, and drooling food: These are hallmark signs of dysphagia and possible aspiration. Difficulty swallowing can lead to aspiration of food or liquids into the airway, triggering protective reflexes like coughing and gagging. B. Swallowing more than once after taking a bite of food: While this can be associated with difficulty swallowing, it is a subtle sign and not as clearly indicative of aspiration as choking or coughing. C. Swallowing liquid immediately after taking a sip of a beverage: This reflects normal swallowing mechanics and does not indicate dysphagia. D. Highly sensitive gag reflex: A strong gag reflex is actually a protective mechanism and not a sign of dysphagia. A diminished gag reflex would be more concerning.