If you are going to write a short story, you don't need to make things up entirely.
You should always use as much creativity as you can, but you can also take elements from real life and incorporate it in your story.
The best answer to complete this sentence would be the third option aka C) Theme of equal rights.
<span>Choice (D) is the most grammatically correct sentence. This sentence has a dependent clause followed by an independent clause, both separated by a comma. This allows for the two clauses to be properly joined and for the sentence to contain a logical flow.</span>
Answer: He begin to think of ways to improve the lives in his community
Explanation
The answer is "He begin to think of ways to improve the live sin is community because in the text most the the passage identifies the problem, then he thinks about building a generator and the bigger battery.
Why the other answers are wrong
A is wrong because it tells us the solution not the central idea.
C identifies the problem, not the Central idea of the text.
D is wrong because it tells us his decision, it is better than the other answers but not the best.