Q. What is an equivalence partition (also known as an equivalence class)?

• (A) A set of test cases for testing classes of objects
• (B) An input or output range of values such that only one value in the range becomes a test case
• (C) An input or output range of values such that each value in the range becomes a test case
• (D) An input or output ranges of values such that every tenth value in the range becomes a test case.