Incorrect answer in Quiz "Inheritance", Part 9, "Class inheritance"

[EmilianoEscobedo]

In the following quiz, the correct answer is the number 2 but its marked the number 8 as correct.

What does the program print?

public class Counter {

public int addToNumber(int number) {
    return number + 1;
}

public int subtractFromNumber(int number) {
    return number - 1;
}

}

---

public class SuperCounter extends Counter {

@Override
public int addToNumber(int number) {
    return number + 5;
}

}

---

public static void main(String[] args) {
Counter counter = new Counter();
Counter superCounter = new SuperCounter();
int number = 3;
number = superCounter.subtractFromNumber(number);
number = superCounter.subtractFromNumber(number);
number = counter.addToNumber(number);
System.out.println(number);
}

Select the correct answer

• 2 (this is the correct answer)
• 3
• 4
• 7
• 8 (this is marked as the correct answer in the quizz)
• 9