An engineer needs to ensure that a script has not been modified before it is...

Hashing produces a fixed-length fingerprint of the script’s contents. By comparing the current hash with a known good hash, the engineer can verify if the script has been altered. Hashing is a one-way function used to validate integrity.

Masking (A) hides data, obfuscation (B) hides code logic, and encryption (D) protects confidentiality but does not verify integrity as simply.

Integrity checking through hashing is fundamental in General Security Concepts【6:Chapter 7†CompTIA Security+ Study Guide】.