Question: If H is a collision resistant hash function, will H ' ( m ) = H ( m ) | | m also be collision

If H is a collision resistant hash function, will H'(m)=H(m)||m also be collision resistant?
A. Yes, H' is collision resistant as long as H is collision resistant.
B. It depends on the construction of H.
C. No, we can find collision if H is a Merkle-Damgard hash function.
D. No, we can find collision on H' even if H is collision resistant.
If H is a collision resistant hash function, will

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