The correct answers are B) an illustration of class differences and D) a commentary on marriage.
The features of a comedy of manners that are present in the passage are an illustration of class differences and a commentary on marriage.
Oscar Wilde wrote the play "The Importance of Being Earnest: A Trivial Comedy for Serious People" that has its inaugural date on February 14, 1895. The play refers to the old customs of Victorian manners in London and satirizes formal institutions such as marriage.