A business unit has unpredictable spend spikes. They want alerts at 50%, 80%, and 100% of budget and a quick way to see which services drive variance. What solution design fits?
A. Create a subscription-level budget with multiple thresholds and action groups, and use Cost Analysis filtering to break down spend by service and tag.
B. Create a management group policy that denies deployments when daily costs exceed the prior week average, preventing runaway spending automatically.
C. Enable Azure Advisor only, because Advisor will generate budget alerts and show per-service variance without additional configuration needs.
D. Export billing data to a storage account and rely on ad-hoc spreadsheets, since exports automatically create alerts for defined thresholds.
Create a subscription‑level budget with multiple thresholds and action groups, then use Cost Analysis to break down spend by service or tag.