Please help! Timed In Act 1, ISection 2 of The Importance of Being Earnest, how does the cigarette case establish important plot elements?

A. The inscription on the case, "From little Cecily, with her fondest love to her dear Uncle Jack," leads to the disclosure of important background information, causing Jack to disclose that he is called Jack in the country and that Cecily is his ward.

B. The inscription on the case, "From little Cecily, with her fondest love to her dear Uncle Jack," leads to the disclosure of important background information, causing Jack to disclose that he is having an affair.

C. The inscription on the case, "From little Cecily, with her fondest love to her dear Uncle Jack" leads Gwendolyn to turn down Jack's marriage proposal.

D. The inscription on the case, "From little Cecily, with her fondest love to her dear Uncle Jack," leads to Lady Bracknell hiring a detective to look into Jack's background.