A feudal System introduced by the Spanish when the conquered South and central America. they placed Spaniards and charge of hundreds of natives and left them tax them or use them as free labor(=slaves) and in return they maintained older and taught them christianity.
Is Duncan a fool? No.
Reasons Why:
Reason one: Duncan isn’t a fool for going to his house but a fool for not having protection while he rested. Reason two: Duncan isn’t a fool for simply trusting a man that helped win a war. Reason three: Duncan isn’t a fool because he didn’t know Macbeth was plotting to kill him. He was blinded because he thought Macbeth was a good Samaritan. Conclude:
Duncan wasn’t a fool but he was foolish to trust a fool that plotted to kill him and succeed. Duncan wasn’t and still isn’t a fool because he trusted a simile and mustache. Duncan trusted the wrong man that did good deed but the lesson learned here is that a person can do well just as much as a person can do wrong and that greed is the ultimate seed to.
B is the answer to your question