Right Answer is:
Conversion into indirect narration, the below rules are followed:-
Say/Said is changed to ask/asked/wonder/wondered/enquire of/enquired of etc as per the sense of the sentence.
Inverted commas (” “) are removed.
The words like, this, these, tomorrow, yesterday change to that, those, the next day, the previous day respectively.
Simple present tense changes to simple past tense.
First-person pronoun changes according to the subject of reporting speech i.e. ‘we’ will be changed to ‘they’.
Hence, option D is the correct answer.