The correct answer is D: The purpose of this soliloquy is to help Juliet's uneasiness about going through with her plan.
A soliloquy refers to the act of expressing one's own feeling and thoughts in the form of a monologue.
This question refers to Juliet's soliloquy in Act IV, scene III of Romeo and Juliet. In this part, Juliet delivers a soliloquy while she gets ready to drink the potion. She is concerned about the fact that if she dies, she will not see Romeo again.