Final answer:
An Availability Zone in Azure refers to a group of data centers within the same Azure region, each equipped with its own power, cooling, and networking.
Step-by-step explanation:
The correct answer is a) Within the same Azure region. An Availability Zone in Azure refers to a group of data centers within the same Azure region. Each Availability Zone is a physically separate location equipped with its own power, cooling, and networking, ensuring fault tolerance and high availability.