Companies that purchase ________ software can use it in their operations but cannot change the source code themselves.

A) open
B) open source
C) pirated
D) proprietary

Proprietary

Referring to products or technologies owned exclusively by a single company, preventing others from using or copying them without permission.

Source Code

The fundamental component of a programmer's applicative work, consisting of a set of computer instructions or lines of text written in a human-readable programming language.

Operations

The day-to-day activities of a business or other organization, including production, marketing, and management of personnel.