Improve the highlighted part of the sentence.
Remember to insure your vehicle before you drive it.

Option (d) is correct. No improvement is required.
Explanation:
1. The phrase "before you drive it" is grammatically and contextually correct.
2. Options (a), (b), and (c) alter the tense unnecessarily or disrupt the meaning.
3. The action of "insuring the vehicle" occurs before driving, which is correctly expressed in the original sentence.
Hindi Explanation: वाक्य सही है और इसे सुधारने की आवश्यकता नहीं है। "Before you drive it" समय और क्रिया के क्रम को सही तरीके से दर्शाता है।