A.
That is the correct answer.
Answer:
A. Myth
Explanation:
A myth is a traditional story that concerns itself with the early history of a people. Myths can also be used to explain natural or social phenomena. They are considered part of the folklore of a culture, and usually play an important role in a society. Myths typically involve supernatural beings and events, such as gods and heroes.
Another word for impenetrable will be impassable
The outcome of Macbeth's conflict with Banquo and Fleance is that Macbeth tries to have them both murdered, but Fleance escapes. In Act III, Scene iv, as the murderers are trying to complete their task, one says "There's but one down, the son is fled". This shows that Banquo has been successfully killed but Fleance has escaped.