Improve the highlighted part of the sentence. Choose 'No improvement' as an answer if the sentence is grammatically correct.
Make your decision based on facts.

Correct option is A

The sentence is grammatically correct as it is. The phrase "based on" is correctly used to indicate reliance on facts for making a decision.
Grammatical rule used: Prepositions followed by a participle ("based on" is a standard structure). Hindi Explanation: "Based on" का प्रयोग तथ्य या आधार को दिखाने के लिए होता है।
Example:
· Correct: The decision was based on the available evidence.
· Incorrect: The decision was based at the available evidence.