Select the most appropriate option to improve the bold part of the sentence.
This session is an improvement rather the previous one.
Show answer & explanation
Correct answer: D
Explanation
The original sentence 'This session is an improvement rather the previous one' is grammatically incorrect. When comparing two things to show that one is better than the other, the phrase 'improvement over' is the standard idiomatic expression.
Over correctly indicates a comparison where one thing exceeds or is better than another.
The most appropriate option to improve the bold part of the sentence is over.