Eastman Kodak could sell the brownie for very little because he knew he could make money on film and photo processing what would be the best equivalent in this in today’s society

A. Cars that require gas and maintenance.
B. Inexpensive, printers, and costly ink cartridges
C. Food services with additional cost for takeout.
D. Sports clothes that are matching jackets and pants.

B. Inexpensive printers, and costly ink cartridges

This is the best equivalent to Eastman Kodak's business model with the Brownie camera, where the initial hardware was sold at a low price with the intent to make a profit on the recurring sales of necessary consumables, which in Kodak's case was film and photo processing. With printers, companies often sell the printer itself at a low margin or even at a loss, and then make significant profit through the recurring sales of proprietary ink or toner cartridges, which are necessary for the printer's operation and usually quite expensive. This is known as the "razor and blades" business model, where the "razor" (printer) is sold cheaply to boost the sales of the "blades" (ink cartridges).