Analyze the following code:
```
public class A extends B {
}
class B {
public B(String s) {
}
}
```
a. The program has a compile error because A does not have a default constructor.
b. The program has a compile error because the default constructor of A invokes the default constructor of B, but B does not have a default constructor.
c. The program would compile fine if you add the following constructor into A: A(String s) { }
d. The program would compile fine if you add the following constructor
b. The program has a compile error because the default constructor of A invokes the default constructor of B, but B does not have a default constructor.
d. The program would compile fine if you add the following constructor into A: A(String s) { super(s); }
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