Final answer:
Pluto Inc. is obtaining clients through cold calls, promotional letters, and following up on known leads.
Step-by-step explanation:
In this scenario, the company is obtaining clients through cold calls, promotional letters, and following up on known leads. These are all common methods used by businesses to generate new customers or clients. Cold calling involves reaching out to potential customers who have not expressed any initial interest. Promotional letters are sent to targeted individuals or businesses to introduce the company and its services. Following up on known leads refers to contacting individuals or businesses who have already shown some interest in the company's services.