An IT consultant is advising a client on how to optimize their Azure costs. The client uses a variety of services and wants to understand what aspects of their usage could lead to unpredictable changes in their monthly bill. Which factor is likely to contribute to fluctuating Azure costs on a month-to-month basis?
Choosing between standard and premium performance tiers for a storage account
Setting fixed data retention periods for storage accounts
Deploying resources consistently across multiple geographic regions
The amount of outbound data transfer from Azure services