What is the expected outcome when this configuration is in place?

When trying to subscribe to an MQTT broker on the internet, the MQTT client is on a private subnet and must be NATed to reach the public broker.

What is the expected outcome when this configuration is in place?
A . The client periodically reconnects to the default gateway.
B . The client connects only once using the PENDING message to the broker.
C . The client periodically reconnects to the broker over the NAT connection.
D . The client connects only once using the CONNECT massage to the broker.

Answer: D