That would be (A) because an IDS stands for Intrusion detection system which means that when there’s malicious activity or policy violations. Any malicious activity or violation is typically reported either to an administrator.
Both A and B are true. Check out this link: https://www.nerdwallet.com/blog/credit-cards/minimum-payment-credit-card/
I hope this helps!
It's kind of a mix between A and C there are some defragmenting tools that show you how much of your PC is wasted by program files. And in some defragmenting tools, it shows you all the files that are fragmented and gives you the option to defrag them or not. So the best answer would be A.