What is the maximum practical event size Event Grid accepts?

1. ✓ A 64 KB free, up to 1 MB billed in 64 KB increments (correct answer)
2. B 256 KB
3. C 1 GB
4. D No limit

Shortcut: Events up to 1 MB are supported, billed per 64 KB unit. Large payloads should use the claim-check pattern with a blob reference instead.