A Router Running ISIS Is Showing High CPU and Bandwidth

A router running ISIS is showing high CPU and bandwidth utilization. An engineer discovers that the router is configured as L1/L2 and has L1 and L2 neighbors. Which step optimizes the design to address the issue?

A) Make this router a DIS for each of the interfaces
B) Disable the default behavior of advertising the default route on the L1/L2 router
C) Configure the router to be either L1 or L2
D) Configure each interface as either L1 or L2 circuit type

Correct Answer:

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