Answer:
C. To entertain
Step-by-step explanation:
In historical fiction, we know that the facts are altered in order to fit the plot, therefore A is incorrect. (Don't want to inform people that something happened that didn't).
B is incorrect, for similar reasons to a, why persuade someone about false events,
D is incorrect, as it is based in past eras, not exactly the most inspiring to us modern people.
That leaves C. To entertain, and this is true because historical fiction presents a blend fiction and fact in order to entertain the reader.