In the context of Ethernet bridging on Junos devices, what is the purpose of the Spanning Tree Protocol (STP)?

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In the context of Ethernet bridging on Junos devices, what is the purpose of the Spanning Tree Protocol (STP)?
A . To prevent routing loops.
B . To provide a mechanism for VLAN tagging.
C . To prevent Layer 2 switching loops.
D . To filter MAC addresses.

Answer: C