Answer:
B. To create tension by offering audiences just enough information about future events to keep them interested
Step-by-step explanation:
The first act of the play opens with thunder and lightning. The Three Witches decide that their next encounter will be with Macbeth. In the next scene, a wounded sergeant introduces himself to King Duncan of Scotland, reporting that his generals Banquo and Macbeth, who is the thane (baron) of Glamis, have just defeated the allied forces of Norway and Ireland, led by the rebel Macdonwald. Macbeth, the king's relative, is praised for his bravery and skill in battle.
Next scene; Macbeth and Banquo enter. They're discussing the time and their victory. As they approach a moor, the three witches, who were waiting for them, greet them both and start saying their prophecies.