Select the word opposite in meaning to the underlined word.

At first the workers were agreeable to the proposals of their Manager, but later they were reconciled to the new proposals.

The correct option is resistant.

Step-by-Step Explanation:

1. Analyze the Underlined Word:
The sentence mentions: "At first the workers were agreeable to the proposals...". The word "agreeable" in this context means willing to agree, receptive, ready to consent, or yielding to a suggestion or proposal.

2. Understand the Requirement:
We need to find the word that is opposite in meaning (an antonym) to "agreeable". Therefore, the opposite word should mean unwilling to agree, opposing, hostile, or offering force/opposition against the proposals.

3. Evaluate the Options:
- resistant: This word means offering opposition, refusing to accept, or standing against something. This is the direct opposite of being "agreeable" (willing to accept/comply).
- estranged: This means alienated or no longer friendly, which is typically used for personal relationships rather than reaction to business proposals.
- cooperate: This is a synonym or supporting concept to being agreeable, not an opposite.
- agreed: This is also a synonym, indicating consent, which is the same direction as agreeable.

4. Conclusion:
Since "agreeable" means willing to accept or go along with proposals, the opposite is "resistant", which means opposing or fighting against those proposals.