What enables interoperability between subnets on Avalanche?

• A. Subnets can exchange messages and transfer state/assets through cross-subnet calls and messaging, enabling interoperability.
• B. Subnets are isolated and cannot exchange messages.
• C. Interoperability is achieved through centralized gateways outside the network.
• D. Cross-subnet communication only transfers assets, not messages.

Answer: (A)

Interoperability between subnets on Avalanche comes from cross-subnet messaging and cross-subnet calls. These native mechanisms let one subnet send messages to another and transfer both state and assets across subnets, enabling coordination and value movement without leaving the platform. Subnets aren’t isolated by design, and there’s no need for external centralized gateways; the system supports sending not just assets but the actual messages and state needed for interoperability.