Final answer:
Susan bought a harness, a leash, and a comfortable cage for her new puppy, which is the correct answer to the question, option 3.
Step-by-step explanation:
The question asks about the items Susan purchased for her new puppy. According to the provided information, Susan bought her new puppy a harness, a leash, and a comfortable cage. Therefore, the correct answer to the question is option 3) A harness, a leash, and a comfortable cage. It is important to pay close attention to the details given in the question to identify the correct answer.