Final answer:
Before an EGD, fasting is essential to clear the digestive tract and minimize risks. Propulsion, involving peristalsis, occurs throughout most of the alimentary canal, moving food along the digestive system.
Step-by-step explanation:
The pre-test activities that must be performed before an Esophagogastroduodenoscopy (EGD) primarily include fasting. This is critical to ensure a clear view of the upper digestive tract and to decrease the risk of aspiration. Pre-test activities do not involve heavy exercise or eating a heavy meal as they can interfere with the procedure and potentially increase the risk of complications. Consumption of clear liquids may be allowed up to a certain time before the EGD, based on the physician's instructions.
As for the question regarding the process that occurs throughout most of the alimentary canal, the correct answer is b. propulsion. Propulsion refers to the movement of food along the digestive tract, primarily through the action of peristalsis. This process occurs along the entirety of the alimentary canal, starting from the esophagus to the rectum.