Final answer:
An equivalence partition, also known as an equivalence class, is an input or output range of values where only one value is used as a test case to represent the entire range. The correct answer is B, as it is designed to simplify the testing process by reducing the number of test cases.
Step-by-step explanation:
An equivalence partition (also known as an equivalence class) is a concept used in software testing. It can be defined as an input or output range of values such that only one value from the range is used to represent the entire category for testing purposes. The option that best describes an equivalence partition is:
B. An input or output range of values such that only one value in the range becomes a test case.
The goal of equivalence partitioning is to reduce the number of test cases to a manageable level, while still covering all possible scenarios. By assuming that all values in a partition will yield similar results, testers can select a single "representative" value from each partition. This method helps in identifying classes of inputs or outputs that are likely to be handled the same way by the system, thereby simplifying the testing process and ensuring efficiency.