Concept:A good test must meet certain essential qualities: it should measure what it intends to measure (validity), give consistent results (reliability), and have clear, unbiased scoring (objectivity).Explanation:1. Validity – The test accurately measures the specific knowledge or skill it claims to assess.2. Reliability – The test produces stable and consistent scores when repeated under similar conditions.3. Objectivity – The scoring is free from personal bias; different evaluators would arrive at the same result.All three are necessary for a test to be considered truly 'good'. Usability is also important but is not listed among the given options; the question specifically asks for the characteristics included in the options.Answer:D. All of these