Directions: Below is a word/phrasal verb/idiom, followed by three sentences incorporating the word/phrasal verb/idiom. Identify the sentence(s) that best illustrate(s) the meaning of the word/phrasal verb/idiom. Choose option 5: "None of the above" if the word/phrasal verb/idiom is not used correctly in any of the sentences.

REIN IN

A. Each member was asked to rein in ideas for the brainstorming session, encouraging participation.
B. The new policy sought to rein in the use of plastic to promote environmental sustainability.
C. It's crucial to know when to rein in during negotiations for a mutually beneficial outcome.