Which three statements are true？（）
- ACompilation fails.
- BThe code compiles and the output is 2.
- CIf lines 16， 17 and 18 were removed， compilation would fail.
- DIf lines 24， 25 and 26 were removed， compilation would fail.
- EIf lines 16， 17 and 18 were removed， the code would compile and the output would be 2.
- FIf lines 24， 25 and 26 were removed， the code would compile and the output would be 1.