Inability to get access to data; or Inability to make access of data secure.
If it’s the second, then it’s definitely a key risk. If it’s the first then the use of English is poor.
I’m not sure that D is a key risk area (what ever ‘key’ means). Provided the system is well-designed, I don’t think integration makes fraud more likely.
Overall a poor question and don’t worry about it too much.