Correct Answer & Explanation
Option A
• The reporting verb 'said to' changes to 'told' for an assertive sentence.
• The conjunction 'that' is used.
• The pronoun 'I' changes to 'he' (referring to 'the boy').
• The tense 'am' (Present Simple) changes to 'was' (Past Simple) because the reporting verb is in the past tense. So, options B, C, and D are incorrect for not following these rules.