Which of the following groups can legally administer tranquilizers?

The correct answer is licensing veterinarians only because they possess the necessary education, training, and legal authority to diagnose and treat animals, including the administration of tranquilizers. Veterinary medication requires an in-depth understanding of pharmacology, including how different drugs interact with various species and the specific conditions for which they are indicated. This expertise ensures the safety and well-being of the animal, as veterinarians are trained to assess the health status of the animal before administering any medication.

In contrast, while veterinary technicians and students are important members of the veterinary team, they do not possess the same level of authority or training to independently administer tranquilizers. Veterinary technicians typically must work under the supervision of a licensed veterinarian, ensuring that all medical interventions, especially those involving controlled substances like tranquilizers, are conducted safely and under professional guidance. Any animal handler, such as those not trained in veterinary care, lacks the qualifications and legal authority to administer such medications, which could lead to serious health risks for the animals involved.