How does the paragraph above most contribute to a major topic in The Metamorphosis?

A
It explores the topic of alienation, because in the passage, Gregor chooses to be alone rather than sitting with his family.

B
It explores the topic of dreamlike elements, because Gregor is lying down in the darkness of his room.

C
It explores the topic of alienation by showing Gregor being excluded by his family.

D
It explores the topic of ambiguity by not fully explaining the cause of Gregor's wounds.