Correct Answer: The coach asked the athlete why he had come so early that day.

Solution : The correct choice is the second option .

In the conversion to indirect speech, we follow the steps as follows:

• The reporting verb "asked" is used in indirect speech.
• This is appropriate for reporting questions. The direct question, "Why have you come so early today?" is transformed into an indirect question.
• In this transformation, the present perfect tense "have come" becomes the past perfect tense "had come" to maintain the correct sequence of tenses.
• The time reference "today" is changed to "that day" in the reported speech.

Therefore, the correct answer is: The coach asked the athlete why he had come so early that day.