Confuse IS-IS question

[buratino01]

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 ?

[Rikul Raj Gupta]

Definitely not D. Should be BF. Default is the only metric supported on IOS platform.

[_xttbb_]

I agree with Rikul, I think the correct answer should be B and F, please correct me if I am wrong.

[Lovepiece]

I think it's B. Seems to be the right answer

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[Andreaszkl]

Where is moderator??
It is important.
Regards.