The Information Technology Act, 2000 treats some computer misuse as a civil wrong calling only for compensation, and other misuse as a criminal offence calling for punishment. The question asks what tips conduct from the civil side into the criminal side, and each option needs to be tested against that dividing line.
Only the presence of dishonest or fraudulent intent, layered on top of unauthorised access, is what the Act treats as converting the conduct into a criminal offence.
Therefore, the correct answer is When the act is done dishonestly or fraudulently in addition to unauthorised access.