When a Layer 2 EtherChannel is configured, which statement about interaction with the Spanning Tree Protocol is true?

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When a Layer 2 EtherChannel is configured, which statement about interaction with the Spanning Tree Protocol is true?
A . Spanning Tree uses only the member ports for forwarding.
B . Spanning Tree uses the port channel for forwarding.
C . Spanning Tree uses the port channel and member ports for forwarding.
D . Spanning Tree does not use port channels in loop prevention

Answer: B