The answer is definitely A.
Although technically a draw, Edgehill was politically a Royalist victory. Rupert's cavaliers had routed most of the Parliamentary cavalry, and the king's forces had managed to stave off a serious 11th-hour attack. Then, too, King Charles was still astride the path to London.
His killer wanted to unite all Serbs under one government not Austria.The Austrians wanted to punish Serbia plus the alliance system pulled one nation after another into the war.