Hi Akansha,
This is a clear conditional reasoning problem, which means that diagramming is almost always necessary; as a parallel reasoning question, this is even more true. So first off, the reasoning in the stimulus is:
Show Contempt For
OR Believe Significant Harm
Practical Joke
and the contrapostive:
Practical Joke
Contempt for AND Believe Significant Harm
So the correct answer will either parallel the initial diagram or its contrapositive.
Answer choice (C) parallels the initial diagram, as it diagrams out to:
Believe Significant Harm
Practical Joke
Answer choice (D), however, doesn't work because it diagrams out to:
Believe Shows Contempt For
Practical Joke
The critical difference being the belief versus a statement of actual fact. The intent requirement only exists on the Causing Significant Harm condition, not the Contempt one; it is immaterial whether the practical joker believes the joke shows contempt for the target, only that the joke actually shows that contempt.
Hope this helps!