NAT processing in Junos OS follows a strict sequence to ensure correct packet handling:

Static NAT -- applied first because it provides a permanent one-to-one bidirectional mapping.

Destination NAT -- applied second to translate inbound destination addresses, often used for servers in private networks.

Source NAT -- applied last to translate outbound private source addresses to public ones.

This ensures deterministic behavior and avoids conflicts between translation types.

Options B, C, and D list incorrect sequences.

Correct Order: static NAT destination NAT source NAT