【評論主題】14. The relation between a form (a red light) and a meaning(stop) _______ from its contrastive relat

【評論內容】請問為什麼答案是c?

【評論主題】27. A: I saw Shannon having a drink with Tom at a pub lastnight.B: The girl you saw ______ Shannon.

【評論內容】請問為什麼是c?謝謝