Select the option that expresses the following sentence in direct speech.
"Mother warned me not to make a mess of the living room again."

Explanation of the Correct Answer:
· To convert indirect speech to direct speech, we need to restore the original dialogue and correctly place the quotation marks and imperative form.
· The phrase "Mother warned me not to make a mess..." suggests an imperative sentence with a warning tone.
· The correct transformation should be "Mother warned, 'Don't make a mess of the living room again!'"
· The exclamation mark is appropriate because warnings are often given in a firm or urgent tone.
Other options:
· (a) "Don't you dare to have made..." → Incorrect because "Don't you dare" changes the tone and meaning.
· (b) "Do not make a mess from..." → Incorrect because "make a mess from" is grammatically incorrect.
· (d) "You may not be making..." → Incorrect because "may not be making" does not retain the command format.
Thus, the correct answer is (c) "Mother warned, 'Don't make a mess of the living room again!'"