Personally, I believe that the answer is C. Hundreds of new words are added to the dictionary each year, and some of these do not have origins within the English language- therefore, other cultures and countries will have adopted these from their original language. Hope this helps :)
Oxymoron is used 'deafening silence' those words contradict each other it implies that their silence is giving kate the same impact as if they were screaming in her ears.