The correct answer is D.
Hecate reprimands the witches for acting on their own, which does not occur in Act 3 to resolve Macbeth's conflict. Macbeth's conflict at the end of Act 3 involves his desire to maintain his power and his increasing paranoia, which leads him to order the murder of Banquo and Fleance. Lady Macbeth's attempt to cover up his erratic behavior during the banquet does not effectively resolve his internal conflict.
I hope I helped!
~~~Harsha~~~