Which three statements are true？（）

• A、Compilation fails.
• B、The code compiles and the output is 2.
• C、If lines 16， 17 and 18 were removed， compilation would fail.
• D、If lines 24， 25 and 26 were removed， compilation would fail.
• E、If lines 16， 17 and 18 were removed， the code would compile and the output would be 2.
• F、If lines 24， 25 and 26 were removed， the code would compile and the output would be 1.