In Hard Times, by Charles Dickens, Sissy's father abandons her, yet she continues to hope for his return. What is Dickens revealing through this characterization of Sissy?
that everyone should have hope
that hope is futile
that hope is ridiculous
that hope is essential for humans

I would select "that hope is essential for humans"

Explanation:

The reason is in the story even though Mr. Gradgrind knows Signor Jupe is never coming back, he decides to indulge her child-like faith and allows her to carry the bottle of nine oils with her. The leader of the performing group tells Sissy that the bottle is heavy to carry and will be of little use to her. But Cecilia is convinced that her father will return to find her and that when he comes for her, he will want the bottle.

so whats the question?