Turn his thoughts toward violence and revenge to defend his father’s honor.
Explanation:
Hamlet sees the thousands of men marching to fight in a war pointless and worth nothing so he states “from now on, if my thoughts aren't violent I’ll consider them worthless”
The correct answer is A. Capacity. This is because it is the only word that creates a sentence that makes sense. All other words would create nonsensical sentences or would be grammatically incorrect.