[QA] Her living conditions were difficult. However, she studied very well

Question:

Her living conditions were difficult. However, she studied very well.

• A.
  Difficult as her living conditions, she studied very well.
• B.
  She studied very well thanks to the fact that she lived in difficult conditions.
• C.
  She studied very well in spite of her difficult living conditions.
• D.
  Although she lived in difficult conditions, but she studied very well.