The correct answer is option (D):
No change
The correct answer is "No change". The original sentence "Gandhi sided with the honest" is grammatically correct and the meaning is clear. The phrase "sided with" means to support or agree with someone or something. In this context, it implies Gandhi supported the people who were honest. Therefore, no change is needed as the sentence is already correct. The other options, "sided the honest", "sided by the honest", are grammatically incorrect and change the meaning of the original sentence.