Which Key Vault feature automatically notifies systems or triggers actions when a key or certificate is about to expire?

1. ✓ A Event Grid integration for near-expiry events (correct answer)
2. B Webhook on secret creation only
3. C Azure Monitor alerts on access policy changes
4. D Scheduled purge tasks

Shortcut: Key Vault integrates with Event Grid to publish near-expiry (CertificateNearExpiry, KeyNearExpiry), expired, and other lifecycle events, enabling automated renewal workflows.