In this excerpt, the Victorian social code that stresses the importance of manners is most reflected through Jack's words when he addresses Lady Bracknell. Lady Bracknell's words when she commends Cecily for lying. Jack's actions when he declines to consent to the marriage. Lady Bracknell's actions when she speaks in a "meditative manner."

The correct answer is Jack's words when he addresses Lady Bracknell.

The Victorian society greatly valued manners and social class, and thus they really tried to even exaggerate when it came to such manners. Often, this was all fake - they behaved one way in public, and another when they were alone. Wilde wanted to criticize such a society in his play The Importance of Being Earnest.