Final answer:
The first thing you should do is attend to the client and her cocker spaniel first. Prioritizing the needs of the client and their pet ensures a positive and customer-focused experience in the veterinary office.
Step-by-step explanation:
The first thing you should do in this situation is to prioritize the safety and well-being of the individuals involved. Therefore, the answer would be option a. Attend to the client and her cocker spaniel first. The client and her pet should be given immediate attention to ensure their comfort and address any concerns they may have.
Once the client and her pet have been taken care of, you can then proceed to assist the other individuals. It is important to note that the specific order of attending to the veterinarian, answering the phone, and providing a book for the child may vary based on the urgency and importance of each situation.
Overall, prioritizing the client and their pet's needs ensures a positive and customer-focused experience in the veterinary office.