I believe that it would be A because first, it is putting the more scientific name and than adding on to it saying the better-known name.
In the lines from Shakespeare's "The Tragedy of Macbeth," Lady Macbeth is talking to herself while she is sleep walking. She feels so guilty that she cannot sleep properly. In that respect, she means that she and Macbeth do not need to fear anything because they are so powerful that nobody will believe they are responsible for killing Duncan. However, she does not actually think so - she is only trying to convince herself of it because she is under the impression that everybody is suspicious of Macbeth.
We can assume Macbeth is feeling the emotion of "guilt" based on his vision of Banquo's ghost, since the ghost reminds him that he is responsible for the death.
Hope this helps! :)
