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.