Concept:A proficiency test measures a learner’s overall ability to use a language in real-world situations, not just what they have studied.Explanation:Proficiency tests check how well a student can actually use the language. They evaluate skills like speaking, listening, reading, and writing in practical contexts. These tests are not limited to taught content or daily conversation only. They show the level the learner has already reached. The result reflects readiness for real-world tasks like writing an email or understanding a lecture.Answer:Option A: the level of language that learners have reached.