Answer:
d) broaden his vocabulary
Explanation:
hope this helps!
Macbeth is fearful about hearing the witches prediction about his future because killing the king was considered sinful so therefore he would be a sinner however he was excited about the prediction of his future because he would be a king meaning he would gain power.
The introductory information addresses what the study will entail(talk about)
The setting discusses existing data on your topic and where it takes place
