Correct Answer: Exclaiming gratefully, the convict said to the bishop that he could never thank him enough.

Solution : The second option is correct.

Indirect speech, also known as reported speech or indirect discourse, is a way of reporting what someone else has said without quoting their exact words.

The changes from direct speech to indirect speech involve the following:

• The given sentence is an exclamatory sentence. The exclamatory form is changed into an infinitive form.
• "Exclaiming gratefully" is used here because, in the given context, the convict is grateful to the bishop.
• In the given sentence, the first-person pronoun "I" will be changed to the third-person pronoun "he", as it is used for "the convict".
• "You" is used for "the bishop" so "you" will be changed to "him".

Therefore, the correct answer is: Exclaiming gratefully, the convict said to the bishop that he could never thank him enough.