Answer:
(A) It leads to an argument between Lady Bracknell and Jack about the quality of Cecily's character.
Step-by-step explanation:
Lady Bracknell and Jack do not agree over Cecily's life possibilities in her future. Bracknell wants her to be proper and fit in with society while Jack does not. Also you can use process of elimination to get rid of the other answers since they're obviously wrong.
hope this helped :)