Analysis:
The sentence describes a type of handshake that is appropriate for greeting an American. A 'firm handshake' is generally considered polite and professional in Western cultures.
Breakdown:
- A heavy: Incorrect. 'Heavy handshake' is not a standard idiom.
- B hard: While 'hard' can relate to firmness, 'firm' is the more idiomatic and commonly used adjective for a handshake.
- C firm: Correct. A 'firm handshake' conveys confidence and sincerity.
Translated Question:
18 Поздоровайтесь с американцем ..... рукопожатием.