The core concept here is understanding synonyms. 'Temporary' means lasting for a limited time. - **Correct Answer:** B. 'Brief' means lasting for a short period, which is a synonym for temporary. - **Incorrect Options:** - A. 'Permanent' means lasting forever, the opposite of temporary. - C. 'Endless' means having no end, also the opposite of temporary. - D. 'Constant' means happening continuously, not a synonym for temporary. **Core Concept:** Synonyms **Solution Analysis:** The question tests understanding of the word temporary and choosing its synonym. Brief is the closest in meaning. **Detailed Analysis:** - Option A: Incorrect, as 'permanent' is the antonym of 'temporary'. - Option B: Correct, as 'brief' accurately describes something lasting a short time. - Option C: Incorrect, as 'endless' implies having no limit in time. - Option D: Incorrect, as 'constant' implies something that continues without variation. **Common Mistake:** Confusing antonyms with synonyms, or not fully grasping the meaning of the word 'temporary'.