'The sweet, smoky scent of toasted marshmallows found her nose as she licked melted chocolate from her fingertips." This is your answer as it explicitly states the sense of smell.
You need to be more specific, in what chapter or where exactly are you currently in the story? beginning, middle or end? so I can help you here, what lies ahead of ponyboy will depend on how much you have read.
B is the answer for the question
To conclude means to finish or wrap up
