Refer to the exhibit. You have a non-Cisco switch that is not communicating properly while connected to the distribution-layer Cisco switching fabric. Which two best-practice actions can you take to overcome this problem? (Choose two.)

A.
Turn off MST (802.1s) on all switches.

B.
Turn on MST (802.1s) on all switches.

C.
Turn on RSTP (802.1w) on all switches.

D.
Turn off RSTP (802.1w) on all switches.