It creates a somber mood. Just took that test.
What is the rest of the question?
The correct answer is D. Because it is the only correct sentence.
A isn't correct because it should be: The referee at tonight's game will be me.
B isn't correct because it should be: Eva and I...
C isn't correct because it should be: Ricky and she...
So the only answer left is D.
This is probably referring to the use of the “soul” such as insecurity and doubt, it can hurt or heal you. In simple terms, an double edged sword that lies within the mind is the mind itself, or as Dickens refers to it, an “soul”.
What are the answers you have to choose from?