Who is the only person that can degrade milk?

The dairy inspector plays a vital role in ensuring the quality and safety of milk. Their responsibilities include monitoring and evaluating the conditions under which milk is produced, processed, and sold. This includes assessing the cleanliness of milking equipment, the health of the animals, and the overall sanitation of the dairy facilities. If any violations of health and safety standards are found, the dairy inspector has the authority to condemn or reject the milk, effectively "degrading" it by not allowing it to enter the market.

In contrast, while dairy farmers are responsible for the production of milk, they do not have the institutional authority to degrade it legally. Milk processors may handle and pasteurize milk but do not have the regulatory power to deem it unfit for consumption. Health inspectors also focus on overall public health regulations and may not specifically deal with milk quality. Thus, the dairy inspector is the designated individual who can make those determinations regarding the quality of milk, which is why this option is correct.