Hi guys

which two statements about the IS-IS cost metric are true?(choose two)
A. The cost is calculated automatically based on the interface bandwidth and delay
B. It is the only IS-IS metric supported on Cisco devices
C. The cost is calculated automatically based on the delay only
D. The cost is calculated automatically based on the interface bandwidth only
E. A default cost of 1 is automatically assigned to all interface
F. A default cost of 10 is automatically assigned to all interface

Many dumps show Correct Answer: DF

But refer this link i think correct answer is BF
https://networklessons.com/cisco/cci...c-on-cisco-ios

How do you think ?