Which of the Following Statements Best Describes Third-Party Pay Strategy

Which of the following statements best describes third-party pay strategy?

A) It involves providing free products to a community of product users as a method of generating revenue from a third party who pay to access those users.
B) It involves offering a free product with a paid product or service when the product requires ongoing maintenance.
C) It involves offering a free basic product to gain widespread initial use, after which users are offered a non-free premium version.
D) It involves offering a free version of a product to consumers to use at home, but offering a paid version with additional features to the third-party market.