Which of the following statement is most accurate? A. A reference variable is an object. B. A reference variable refers to an object. C. An object may contain other objects. D. An object may contain the references of other objects. Analyze the following code and choose the best answer. public class Foo {private int public static void main(String[] args) {Foo foo = new Foo(); System.out.println(foo.x);}} A. Since x is private. B. Since x is defined in the class Foo, it can be accessed by any method inside the class without using an object. You can write the code to access x without creating an object such as foo in this code. C. Since x is an instance variable, it cannot be directly used inside a main method. However, it can be accessed through an object such as foo in this code. D. You cannot create a self-referenced object that is, foo is created inside the class Foo. To prevent a class from being instantiated, _____ A. don't use any modifiers on the constructor B. use the pubic modifier on the constructor. C. use the private modifier on the constructor D. use the static modifier on the constructor