What does Lady Bracknell say that makes light of marriage in this excerpt?

a - She says that she does not want gwendolen, an unmarried girl, to sit apart from her guardian ...

b - She says that she disapproves of algernon as a suitable husband because he ate all of the cucumber sandwiches ...

c - She says that she expects certain treatment because she is a married woman ...

d - She says that Lady harbury looks younger since her husband's death.

D). She says that Lady harbury looks younger since her husband's death.

Explanation:

In the given excerpt, option D displays the statement made by Lady Bracknell about making the light of marriage. "She says that lady harbury looks younger since her husband's death' which implies the interrogation of the very nature of marriage and highlights its impacts when she says 'Lady Harbury now (after her husband's death') looks twenty years younger'. The entire play 'The Importance of Being Earnest: A Trivial Comedy for Serious People' by Oscar Wilde primarily intends to question the very essence of marriage and its existence being congenial or not. Thus, option D is the correct answer.