Answer:
The dialogue in the excerpt advances the plot by telling the reader that Paul may have an opportunity to ride Sutcliffe's horse. Mitchell tells Paul that the man from Alabama who wanted him to ride for him came to the stables asking about him, indicating that there may be a chance for Paul to ride Sutcliffe's horse in a race. Therefore, the correct option is:
Paul may have an opportunity to ride Sutcliffe's horse.
Hope it helps! : )