Genetic fingerprinting is a way to identify someone using a sample of DNA and looking at the presence and size of certain fragments.
This means it can be used to know who was in the place where the sample was found, such as a crime scene. But this would only tell us that that person was there, and not why, so it doesn't tell if someone is guilty of a crime.
Another use is to see if two people are related, by looking at how similar their genetic fingerprints are.
This means options I and II are possible, so the right answer is D. I and Il