Final answer:
The personal selling process step that may involve calling on customers without prior consent is the approach.
Step-by-step explanation:
The personal selling process involves several steps, including prospecting, pre-approach, approach, presentation, handling objections, closing, and follow-up.
The step that may involve calling on customers without prior consent is the approach.
During the approach step, the salesperson makes initial contact with the customer and tries to establish a relationship.
This can be done through various methods, such as making a cold call or visiting a potential customer's location without an appointment.
By reaching out to customers without prior consent, the salesperson takes the initiative to introduce themselves and their product, hoping to catch the customer's interest and initiate a sales conversation.