Select the appropriate preposition to complete the sentence.

After several discussions, the committee agreed ________ the proposed schedule.

The correct option is upon.

Step-by-Step Explanation:

1. Understanding the Context:
The sentence context involves a group (the committee) having discussions and reaching a mutual decision or consensus regarding a specific plan or subject (the proposed schedule).

2. Analyzing Preposition Usage with "Agree":
- Agree upon (or agree on): Used when two or more parties reach a mutual decision or consensus after joint discussion regarding a topic, plan, date, or schedule. (e.g., "They agreed upon a meeting date.")
- Agree with: Used when sharing the same opinion with a person or supporting a statement/idea. (e.g., "I agree with your suggestion.")
- Agree to: Used when consenting to or accepting a proposal, rule, or contract. (e.g., "He agreed to the terms of the agreement.")
- Agree for: This is grammatically incorrect in this context.

3. Conclusion:
Since the committee members reached a joint consensus regarding the proposed schedule after discussion, upon is the correct preposition to complete the sentence.

The complete sentence reads: "After several discussions, the committee agreed upon the proposed schedule."