The answer is
D.Show what happened at an earlier point in the story.
True. It is often the case that additional information can be implied, calculated, or directly brought forward from earlier questions. This is not necessarily the case, however, as you may not be able to complete a question right away due to a lack of knowledge or understanding; but the use of 'may' in the question makes this a true statement.
C is the correct on for this problem
The answer is evil and powerful so A.
A supporter or a helping jand