The mother advised her son to be careful and not to enter into a quarrel with the goons.

• A. he mother advised her son, "Be careful and not enter into a quarrel with the goons."
• B. he mother said to her son, "Do not enter into a quarrel with the goons."
• C. he mother said to her son, "Be careful. Do not enter into a quarrel with the goons."
• D. he mother said to her son to "be careful."