Final answer:
An Azure service in public preview is not released to all Azure customers as a fully supported service. It is a test phase version available without an SLA and not recommended for production. General availability signifies its full release to all customers.
Step-by-step explanation:
The question is regarding the availability of an Azure service in public preview. To clarify, any Azure service that is in public preview means that it is in a testing phase and is available to Azure customers, however, it is offered without a service level agreement, and it's not recommended for production workloads. It's important to understand that a service in public preview is not necessarily released to all customers in a general availability status. So the answer to whether an Azure service in public preview is released to all Azure customers is b) False. Only when the service reaches general availability (GA), is it considered fully released and supported for all customers.