Which of the following statements regarding the testing quadrants model is correct?

The testing quadrants model, developed by Brian Marick and promoted by Lisa Crispin and Janet Gregory, is a heuristic tool used primarily in Agile contexts. It categorizes different types of tests across four quadrants to help teams plan and ensure comprehensive test coverage. The model's axes (business-facing vs. technology-facing and supporting the team vs. critiquing the product) provide a clear framework for differentiating tests. This categorization is highly effective for communicating the testing strategy and the purpose of various test types to all stakeholders, including non-technical ones.

B. The testing quadrants model is associated with Agile development, not the V-model. It does not map test types to V-model test levels.
C. The model's axes are typically "Business Facing vs. Technology Facing" and "Supporting the Team vs. Critiquing the Product," not "business-oriented vs. product-oriented."
D. The model encourages performing tests from all four quadrants throughout the project lifecycle, not assigning a single quadrant to a specific iteration.

- ISTQB Certified Tester Foundation Level Syllabus V4.0, Section 2.1.2, Testing in the Context of a Development Lifecycle. The syllabus states, "The testing quadrants model... is a useful way to differentiate and describe types of tests."