Correct Answer & Explanation
Option C
• The reporting verb 'said' remains 'said' as there is no object.
• The connector 'that' is used for assertive sentences.
• The pronoun 'I' (first person) changes according to the subject 'He' to 'he'.
• The modal verb 'can' changes to 'could' in indirect speech.
• The demonstrative 'this' changes to 'that' in indirect speech.