单选题 That delegation made up of some noted professors and accomplished scientists left that city and arrived home {{U}}who became still not knowing about the story of the tourguide.{{/U}}

• A. becoming not knowing still what the story told by the tourguide had meant.
• B. who became ignorant still of the meaning of the story told by the tourguide.
• C. still none the wiser about the meaning of the story told by the tourguide.
• D. still remained unaware of the meaning of the tourguide's story.