Which interface type could help accomplish this?

A company is looking to increase redundancy in their network.

Which interface type could help accomplish this?
A . Layer 2
B. Virtual wire
C. Tap
D. Aggregate ethernet

Answer: D

Explanation:

An aggregate group increases the bandwidth between peers by load balancing traffic across the combined interfaces. It also provides redundancy https://docs.paloaltonetworks.com/pan-os/10-1/pan-os-networking-admin/configure-interfaces/configure-an-aggregate-interface-group#id9c0f5a8b-0aad-4be5-821d-ef9d7c11a88d