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 range of values such that every tenth value in the range becomes a test case.

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 range of values such that every tenth value in the range becomes a test case.

**Ans: ‘B’**