Why does darcy intervene to provide for whickham and lydia?
a. he regrets his assessments of mrs. bennet and wants to releive her distress.
b. he feels responsible for them because he kept wickham's nature a secret.
c. he knows that lady catherine will approve of his charity to the bennets
d. he is sure that elizabeth will marry him if she know what he has done.

The correct answer is option B. Darcy intervenes because he feels responsible for them because he kept Wickham's nature a secret. Darcy tells Mr. Gardiner that he had done all that because he felt responsible for Lydia’s ignorance of the true nature of Wickham. Then, Mr. Gardiner tells Elizabeth this and she is overcome by all that Darcy had done.

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