Choose all of the declarations of x that will not cause a compiler error. : Questions « Statements « SCJP

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public class MainClass {
  public static void main(String[] argv) throws Exception {

    switch (x) {
    case 100:
      System.out.println("One hundred");
      break;
    case 200:
      System.out.println("Two hundred");
      break;
    case 300:
      System.out.println("Three hundred");
      break;
    }
  }
}

A.  byte x = 100 ;

B.  short x = 200 ;

C.  int x = 300 ;

D.  long x = 400 ;