Please help, I am so confused

I’m pretty sure it would be C. It’s asking for the best sentence that would support the word eager. It didn’t ask for a sentence out of the text. And Answer C is the only one that best supports the meaning of eager.

Her beauty and ease mask a darker reality is the inference that can be made about  Daisy Buchanan.

Nick Carraway, the character and  narrator in The Great Gatsby , is making this description of Daisy, his cousin. Nick is having dinner  with Daisy and , her husband,  Tom and with Jordan Baker, Daisy's beautiful friend. Nick and Daisy are having a shallow conversation about the butler  ,but Daisy tells Nick she has got a secret to tell him. At that moment ,Nick observes Daisy 's beauty " a moment the last sunshine her glowing face" ; then he feels forced to listen to the secret:  "her voice compelled me I listened..." ,but ,after the butler has come back to tell Tom, secretely,  he has got a  telephone call, Daisy's beauty vanishes : " then the glow faded, lingering regret,..". Daisy's beauty is hiding a secret or a darker reality. In fact, Tom has a lover and the phone call is from her. Daisy knows about her husband's love affair.