In “Nectar in a Sieve” the narrator is Rukmani, she is telling her own story as a flashback and she includes all the details she consider important, however the story is very subjective, hence we only have her point of view, this is the central narrator and is called first-person point of view
I believe it is option "D.) The flu vaccine is not reliable enough to be worthwhile" It would have a negative impact on the economy due to people not spending money to have the flu vaccine.