The word impeccable could replace the italicized word in which of these sentences

Hi there!

In order to know where impeccable can be used in these sentence, we need to know what the term means. 

Impeccable means perfect - to the highest of standards. 

Therefore, the answer would be C because "flawless" is a synonym for "impeccable"; it means perfect. 

Hope this helps!

C.Harold's bedroom is flawlessly organized

Anne frank was a very difficult person because she would never listen to her moms sometimes her dad even though he was her favorite and in times like that it would make it harder for there parents and other people in the annex to deal with her and since they were just stuck in there the couldn’t do anything but grounding her but even that didn’t work. hope that :