Refer to the exhibit.
The switches in the exhibit are all ArubaOS switches that run MSTP. The network administrator wants all of the switch-to-switch links shown in the exhibit to be available for forwarding routed traffic.
What should the administrator do to accomplish this?
To ensure that all switch-to-switch links are available for forwarding routed traffic in a network running MSTP, the administrator should configure BPDU filters on the switch-to-switch ports. BPDU filters prevent the switches from sending or receiving Bridge Protocol Data Units (BPDUs) on those ports, which can prevent them from transitioning into a blocking state in the presence of MSTP.
D is right. The BPDU filter is used on switch-to-switch links to prevent the blocking state by MSTP
D is correct.