Answer:
The witches' prophecy were right about Macbeth becoming the Thane Of Cawdor.
Step-by-step explanation:
The original Thane Of Cawdor was captured because he was a "traitor". They saw greatness in Macbeth, so Ross and Angus confirmed that Macbeth shall be Thane Of Cawdor, right after he not too long ago heard this prophecy from the weird sisters.