There are about 4, but I think the most important are~
To persuade and to inform.
Is that what the books called ?
Problems that may result from taking revenge would be potentially creating more problems between people. It is better to be the bigger person, accept and leave a situation as it is.
The correct answer is B.
The way a conflict is resolved usually suggests something about the theme.
For example, let's say a theme is "truth." If a conflict has a positive resolution, that says something different than if it has a negative resolution. A negative resolution to a conflict might indicate truth is painful, while a positive resolution to a conflict might indicate truth is necessary and/or healing.