The answer sheet is correct.
The passage gives 3 different identity crimes but the question asks about identity thefts, as you are aware. Identity theft is a type of identity crime. It doesn't matter if there are more types of identity crimes or not, identity theft is still just one type.
I do think you could make a case for Not Given. The passage gives information about identity theft but doesn't actually go into any detail on examples. We don't know anything about possible kinds of identity theft.
However, on this example the question seems to be testing whether you are noticing that the section that talks about 3 main parts is talking about identity crimes and the question is talking about identity thefts.