Final answer:
Mark Johnson is primarily a 4) Customer Service Representative.
Step-by-step explanation:
The subject of this question is Business and the question is at a High School level. Mark Johnson's role as a Customer Service Representative for OceanView Metal Industries involves answering customer questions about the firm's products and arranging for routine orders to be sent to the customer's construction site. This makes Mark primarily a Customer Service Representative. As a Customer Service Representative, Mark serves as a point of contact for customers, addressing their inquiries and ensuring their orders are processed smoothly.