JavaScript Question of the Day Feb. 3, 2025

The following program currently results in an error when run:

let ball;

function main() {
    createCircle(50, 200, 100, "green");
    changeBall();
}

function createCircle(radius, x, y, color) {
    let ball = new Circle(radius);
    ball.setPosition(x, y);
    ball.setColor(color);
    add(ball);
    return(ball);
}

function changeBall() {
    ball.setColor("purple");
}

main();

Which of the following would fix the program, resulting in a purple ball on the canvas?

1. Correct Answer
   Incorrect Answer
   a

   Changing line 4 to be ball = createCircle(50, 200, 100, "green");

2. Correct Answer
   Incorrect Answer
   b

   Deleting the keyword let on line 9 so that it reads ball = new Circle(radius);.

3. Correct Answer
   Incorrect Answer
   c

   Changing the variable name in the createCircle() function from ball to something different.

4. Correct Answer
   Incorrect Answer
   d

   Implementing options A or B would result in a purple ball.