單項(xiàng)選擇題

public class Foo { 
public int a; 
public Foo() { a = 3; } 
public void addFive() { a += 5; } 
} 
and: 
public class Bar extends Foo {
public int a; 
public Bar() { a = 8; } 
public void addFive() { this.a +=5; } 
} 
invoked with: 
Foo foo = new Bar(); 
foo.addFive(); 
System.out.println(”Value: “+ foo.a); 
What is the result?() 

A. Value: 3
B. Value: 8
C. Value: 13
D. Compilation fails.
E. The code runs with no output.
F. An exception is thrown at runtime.

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