Which of the following is an Agile Manifesto principle?

The principle from the Agile Manifesto that aligns with the correct answer emphasizes that "working software is the primary measure of progress." This principle highlights the importance of delivering functional software as a key indicator of success within Agile methodologies. In Agile practices, tangible results and working increments of software are more valuable than extensive planning documents or theoretical discussions.

Focusing on working software fosters a culture of collaboration, regular feedback, and the continuous delivery of value to customers. Teams prioritize working solutions to ensure that they are meeting users' needs and can quickly adapt based on feedback, rather than solely measuring progress through documentation or adherence to initial plans.

The other options present ideas that do not align with the Agile philosophy. While they may contain elements that are present in traditional project management practices, they do not resonate with the core Agile principles outlined in the Agile Manifesto. For instance, comprehensive documentation is often downplayed in favor of direct communication and interactions, and contract negotiation is not prioritized over customer collaboration, which is a fundamental tenet of Agile. Similarly, while planning remains important, it is not viewed as more critical than the ability to respond adaptively to change.