單項選擇題

interface Beta {} 
class Alpha implements Beta { 
String testIt() { 
return “Tested”; 
} 
} 
public class Main1 { 
static Beta getIt() { 
return new Alpha(); 
} 
public static void main( String[] args ) { 
Beta b = getIt(); 
System.out.println( b.testIt() ); 
} 
} 
What is the result?()  

A. Tested
B. Compilation fails.
C. The code runs with no output.
D. An exception is thrown at runtime.

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