Final answer:
The correct answer is option c. Christian is unprepared to rhapsodize about love because he is not skilled at expressing emotions eloquently. He is sincere in his feelings but lacks poetic articulation.
Step-by-step explanation:
Christian isn't prepared when Roxane asks him to rhapsodize about love primarily because C) He is not skilled in expressing emotions. Christian struggles to articulate his feelings in a poetic or sophisticated manner, which makes it difficult for him to fulfill Roxane's romantic expectations.
Unlike Cyrano, who has a way with words, Christian's attraction to Roxane is sincere but he lacks the eloquence to convey his passion adequately. Being a man of action rather than of words, the complexities of verbalizing his emotions in a refined or lyrical way overwhelm him, thus leaving him unprepared to rhapsodize about love as Roxane desires.