Which Service Bus feature is required to implement fan-out messaging where 5 different services each receive a copy of every order message?

1. A 5 separate queues with forwarding
2. ✓ B One topic with 5 subscriptions (each with True filter) (correct answer)
3. C One queue with 5 competing consumers
4. D Event Hub with 5 consumer groups

Shortcut: A topic with 5 subscriptions (each with the default True filter) delivers a copy of every message to each subscription. Each subscription acts as an independent queue for its subscriber.