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.
16 in Binary is ob10000
32 in Binary ob100000
I'm not sure if those are in 8 bit or not.
