Answer:
D. Algernon pokes fun at the fact that marriage in his society often is based on social rules, not romance.
Step-by-step explanation:
Oscar Wilde's comedy "The Importance of Being Ernest" revolves around a wealthy gentleman Algernon Moncrieff and his friend John Worthing. The story delves into themes of society, love, social status and the unnecessary belief in their alter egos' world that enables them to enjoy their lives.
In the given dialogue between the two men, Algernon seemed critical of Jack's decision to marry Gwendoline. For, according to Algy, love is "business" and something which Jack feels is "unromantic". But as Algy had rightly said, and considering 19th century England's society, it is only right to assume that marriage is a matter of social class rather than romance or love.
Thus, the correct answer is option D.