Asap ! main idea- definition: how do you go about finding the main idea of a story?

Need the answer asap! read the sentence from the declaration of independence. which idea does this sentence best to develop ? that whenever any form of government becomes destructive of those ends, it is the right of the people to alter or abolish it, and to institute new government a) governments ultimately have the power to determine what rights the people have. b) revolting against the government should not be taken lightly. c) the colonists should seperate from great britain and create their own government. d) it is self evident that people have inalienable rights

Plz i'm really bad with these and it would really mean a lot if you could ?

How did adichie allow a single story to construct her understanding of other people?