The main idea was that Mordred knew that he was dying so he took the opportunity to kill King Arthur
C because "the flow" of the sentence is correct. It is not too complex. Its not A because A "are the cost of" is to complex. Its not B because the use of "Noisily" in the sentence should be placed at the end, its a wrong use of juxtaposition.
-"come to a time when no one dared speak his mind"
this is the right answer because animal farm was based after Soviet Russia which burdened the citizens because they could not express themselves because every aspect of life in a communist country is under government rule.