The final tragic battle of the Arthurian legend begins during a reconciliation between Arthur and his son, Mordred, when both sides mistake a soldier drawing his sword to kill a snake as the attack signal.

A) a soldier drawing his sword to kill a snake as the attack signal
B) a soldier's drawing of his sword to kill a snake for the attack signal
C) a soldier drawing his sword for killing a snake to the attack signal
D) the drawing of a soldier's sword to kill a snake for the attack signal
E) a sword drawn by a soldier to kill a snake as the attack signal