Which Two Statements About Wide and Narrow Metrics Used in IS-IS

Multiple Choice

Which two statements about wide and narrow metrics used in IS-IS are correct? (Choose two.)

A) Wide metrics are enabled with the wide-metrics-only parameter under protocols isis hierarchy. Wide metrics are enabled with the wide-metrics-only parameter under protocols isis hierarchy.
B) Narrow metrics are enabled by default and use 8 bits in TLVs to send information.
C) Wide metrics are sent by default and use 24 bits in TLVs to send information.
D) Disabling narrow metrics results in external routes being leaked from L1 to L2 areas automatically.