The correct answer is distinguishing mark.
C. distinguishing mark
The correct answer is (C) Distinguishing mark or feature; stamp. An official seal, as on a letter or document. Also, an expression of approval. Finally, a mark of distinction, quality, status, or prestige.
Cachet comes from French cacher
Examples of use:
- All the works of that painter have a certain cachet.
- A good vocabulary is often the cachet of intelligence.