The theme that is supported by Macbeth’s lines below is that "Ambition unchecked can lead to corruption".
In this excerpt, Macbeth wanted to kill Duncan. He believed that King Duncan needed to be killed before he could get into the position of being a king.
In the excerpt, it discusses that due to the ambition that Macbeth had to become the king, he could go to any length to achieve his aim even if it means killing another person.
In conclusion, the correct option is B.
Read related link on:
https://brainly.com/question/24573267