What is the main security service a cryptographic hash provide?

Ease of computation is a performance design goal of hash functions, not a security service - it describes efficiency, not a protection mechanism.

Message authentication requires a shared secret key (as provided by HMAC), which a plain cryptographic hash does not include; listing collision resistance alone also omits the broader pre-image resistance that defines computational infeasibility.

Collision resistance is one specific component of the broader computational infeasibility property, making option D a more complete and accurate description of the full security guarantee a hash function provides.

Cryptographic hash functions provide integrity by producing a fixed-length digest that detectably changes if the underlying data is altered in any way. Computational infeasibility - encompassing pre-image resistance (inability to derive input from output) and the practical impossibility of finding collisions - is the foundational security guarantee that makes hash-based integrity checks trustworthy and unforgeably binding to the original data.