Which of the following statements about terminal selection principles are correct?

The maximum spectroscopic ratio supported by 10G EPON is?

When the DHCP Option 82 function is enabled globally and in the VLAN service profile and the port and service port allows the user-side DHCP packets to carry the Option 82 information, what is the processing policy if a user-side DHCP packet with Option 82 is received?

The scope of protection of the (multiple choice) GPON Type B dual attribution protection includes

In the upstream direction of the OLT, link aggregation can be used to improve bandwidth and reliability. Which of the following OLT uplink aggregation modes are supported?