Which of the Following Choices Is the Best Example of a Policing

Which of the following choices is the best example of a policing and enforcement cost?

A) An automobile manufacturer spends years perfecting an emissions-free vehicle.
B) An online retailer creates a subscription program that provides extra benefits to subscribers.
C) A consumer products firm spends millions of dollars creating a marketing campaign targeting millennials.
D) A furniture retailer employs a quality control officer to check incoming shipments.