In this scenario, given the individual's age, heart problems, confusion, and symptoms of pale and sweaty skin, it is important to prioritize their immediate medical needs. The most appropriate course of action would be:
B. Check vitals and apply an AED.
Checking the individual's vital signs, such as their pulse, breathing, and blood pressure, is crucial to assess their current condition and determine the severity of the situation. Applying an Automated External Defibrillator (AED) may be necessary if the person is experiencing cardiac arrest or if their heart rhythm is abnormal. Promptly initiating cardiopulmonary resuscitation (CPR) and using an AED, if indicated, can help provide lifesaving interventions until further medical assistance arrives.
Performing a detailed physical examination, interviewing neighbors, or taking spinal precautions are important considerations in some emergency situations. However, given the specific symptoms and risk factors described in this scenario, prioritizing immediate assessment of vital signs and potentially using an AED takes precedence. Rapid transport to a medical facility should also be arranged as soon as possible.