Which of the following statements about the testing quadrants model is true?

Each of the four testing quadrants (Q1, Q2, Q3, and Q4) represents a different test level (Q1 = Unit, Q2 = Integration, Q3 = System, and Q4 = Acceptance) and describes the different test types that shall be performed by Agile teams in that test level for an Agile project

Each of the four testing quadrants (Q1, Q2, Q3, and Q4) contains different test types and test levels, and these quadrants are numbered to describe the order in which the associated test types and test levels shall be performed in an Agile project (Q1 first, Q4 last)

Each of the four testing quadrants (Q1, Q2, Q3, and Q4) contains different test types and test levels, and these quadrants can be used by Agile teams and other stakeholders to ensure that all important test types and test levels are included in an Agile project

Each of the four testing quadrants (Q1, Q2, Q3, and Q4) contains different test types and test levels, and these quadrants are numbered to describe the risk level associated with the test types (Q1 = least risky, Q4 = most risky)