Read the passage carefully and answer the question given below. A little girl was learning a history lesson with her governess. All the morning she had been reading it over and hearing it explained by her governess, but no good came of either the reading or the teaching. The governess went over the lesson several times, explained the meaning, and for the last time, asked her pupil to read it over. After due time had been given, the girl was examined as to her knowledge of the lesson, but not a single answer could she give correctly. The governess lost patience with her, and threatened to punish her unless she could state where a certain treaty was signed.
According to the passage, the little girl read the lesson and heard it explained all the morning because

Options

A. the girl did not like her governess
B. the governess could not explain it long enough
C. the girl could not understand it
D. the girl read the lesson only once