Can some one help me with 3 questions about Macbeth????

Question

anonymous · Answer

What is the tragic flaw that spurs Macbeth’s actions?       (Points : 3)
       ambition

       pride

       vanity

       dishonesty
****my answer is A

anonymous · Answer

Before Lady Macduff is killed, she realizes the truth of the duality that to do harm is “often laudable” while doing good may be (Points : 3)
       “a wife’s duty.”
       “dangerous folly.”
       “the surest way to anger Macbeth.”
        “more laudable.”
**** my answer is B

anonymous · Answer

In Act IV, Macduff becomes angry with Malcolm when Malcolm (Points : 3)
       doubts his own ability to rule wisely.
       enlists the assistance of the English king.
       raises an army to overrun Scotland.
       complains about Macbeth’s tyranny and plots against him.
*****im not sure about this one