Which of the following describes a Proprietary System?

A proprietary system is defined as one that is owned and controlled by its developer or vendor. This ownership means that the source code is typically not available to the public, and users are restricted in how they can use, modify, or distribute the product. Proprietary systems often come with licenses that protect the intellectual property of the developer and can limit user engagement and customization.

In contrast, options that suggest openness or independence from the vendor relate more to open-source or community-driven models. Open user contributions imply a collaborative environment where anyone can contribute to the project, which does not fit the proprietary definition. Similarly, a system that operates independently of a vendor or is frequently updated by user feedback points towards systems designed for user interaction or community management, which are notably different from proprietary systems.