Which of the following explains why an attacker cannot easily decrypt passwords using a rainbow...

Salting is a technique used to enhance the security of hashed passwords by adding a unique, random value (salt) to each password before hashing it. This prevents attackers from easily decrypting passwords using rainbow tables, which are precomputed tables for reversing cryptographic hash functions. Since each password has a unique salt, the same password will produce different hash values, making rainbow table attacks ineffective.

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CompTIA Security+ SY0-701 Course Content: Domain 04 Security Operations​.

CompTIA Security+ SY0-601 Study Guide: Chapter on Cryptography and Hashing Techniques​.