Which two ways exist for the tunnel path across the core?

You are configuring MPLS traffic-engineering tunnels in the core.

Which two ways exist for the tunnel path across the core? (Choose two )
A . Tunnel links inherit IGP metrics by default unless overridden
B . Tunnels can be configured with dynamic path or explicitly defined path
C . A zero bandwidth tunnel is not a valid option
D . The bandwidth statement creates a "hard" reservation on the link-The dynamic path option is supported only with IS-IS

Answer: A,B