Which two options provide the best loop protection in this topology, regardless of a bridged domain configuration?

Refer to the exhibit.

Which two options provide the best loop protection in this topology, regardless of a bridged
domain configuration? (Choose two.)

A.
PVRSTP on all switches

B.
REP on all switches

C.
MST on all switches

D.
BPDU guard on Switch A and Switch D

E.
8032 on ring A-B-C-D