Correct option is D
An ad hominem fallacy is an attack on the person making an argument, rather than the argument itself. In this case, the speaker is attacking the person's character by pointing out that they also stole chocolates when they were a kid. This attack is irrelevant to the validity of the argument, and it does not address the issue of whether or not the speaker should stop stealing chocolates.
Red herring is a fallacy in which an irrelevant topic is introduced to divert attention from the original issue.
Strawman is a fallacy in which an argument is misrepresented in order to make it easier to attack.
Missing the point (ignorance Elenchi) is a fallacy in which the speaker fails to address the central issue of the argument.