Given: 11. public void go(int x) { Which statement is true?（）

• A、All of the assert statements are used appropriately.
• B、Only the assert statement on line 12 is used appropriately.
• C、Only the assert statement on line 15 is used appropriately.
• D、Only the assert statement on line 18 is used appropriately.
• E、Only the assert statements on lines 12 and 15 are used appropriately.
• F、Only the assert statements on lines 12 and 18 are used appropriately.
• G、Only the assert statements on lines 15 and 18 are used appropriately.