Authors use flashbacks to���
a. connect a story to its historical period.
b. create a story that is not located in a particular time or place.
c. reveal events that happened prior to the beginning of a story.
d. suggest what will happen to characters in the future.

The answer would be C because flashbacks allow you to understand the characters more by allowing you to see their backstory.

Character in a story usually told in the sentence that described  his/her thought, action, and point of view.

For example, if the sentence described how the character manage to defy someone that has greater power than him, we can tell that the Character is brave and not afraid to do what he thinks is right.

hope this helps