The step of the selling process that a salesperson learn as much as possible about a prospective customer before making a sales call is: Pre-approach.
Pre-approach selling process can be defined as the way in which a sales person learn more about a prospective customers before approaching the customers.
Pre-approach enables a salesperson to plan ahead by obtaining more facts or information about their target customers before making their presentation or before contacting their customers.
Most salesperson often make use of pre-approach as this will enable them to know more about their client as well help build their confident before approaching their client.
Pre-approach selling process can prevent a salesperson from making mistakes when carrying out their sales presentation based on the already relevant information the salesperson has at hand.
Learn more about pre-approach here: https://brainly.com/question/7183288
