VI. Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of the sentence in the following questions from 49 to 50.
Her living conditions were difficult. However, she studied very well.
A.She studied very well because of her difficult living conditions.
B.She studied very well, so she lived in difficult conditions.
C.Because her living conditions were difficult, she studied very well.
D.Although she lived in difficult living conditions, she studied very well.