Final answer:
Option (C), Package design firms, market research companies, photographers, and printers are examples of Collateral service providers, which provide necessary services for marketing material development and strategy.
Step-by-step explanation:
Package design firms, market research companies, photographers, and printers are examples of Collateral service providers. These entities support the marketing and advertising efforts of a company by providing essential services that contribute to the creation of marketing materials and strategies.
Collateral service providers are crucial in assisting companies with the development and production of physical marketing assets, such as brochures, product packaging, and promotional photographs, as well as in gathering and analyzing market data to guide marketing strategies.