Answer :
The correct answer is option C) "The title is helpful in establishing the play as a comedy of manners because it makes use of witty wordplay". The play "The Importance of Being Earnest" by Oscar Wilde deals with the protagonists trying by different means to run from their burdensome social obligations. The comedy nature of the play could be easily spotted by the title, which in fact originally has the full name "The Importance of Being Earnest, A Trivial Comedy for Serious People".