import java.util.*；  public

import java.util.*；  public class NameList {  private List names = new ArrayList（）；  public synchronized void add（String name） { names.add（name）； }  public synchronized void printAll（） {  for （int i = 0； i System.out.print（names.get（i） +“ “）； }  }  public static void main（String[] args） {  final NameList sl = new NameList（）；  for（int i=0；i<2；i++） {  new Thread（） {  public void ruin（） {  sl.add（”A”）；  sl.add（”B”）；  sl.add（”C”）；  sl.printAll（）；  }  }.start（）；  }  }  }  Which two statements are true if this class is compiled and run？（）  

• A An exception may be thrown at runtime.
• B The code may run with no output， without exiting.
• CThe code may rum with output “A B A B C C “， then exit.
• DThe code may ruin with output “A A A B C A B C C “， then exit.
• E The code may rum with output “A B C A B C A B C “， then exit.
• FThe code may ruin with output “A B C A A B C A B C “， then exit.