I'd say that the technique of satire used by Wilde in The Importance of Being Earnest is b. ridiculously exaggerating the importance people such as Gwendolen place on a name.
She knows that she wants to marry a man named Ernest, because that is a good and decent name - when she finds out that Ernest's name is actually Jack, which is a common and mundane name, she sort of changes her opinion about him based on such an irrelevant fact.
10 years is how long it took to pay their debt
Can you attach the passage? I need it to find the main idea.