Which statement is false? (1 point)
a. every integer is a real number
b. the number zero is a rational number
c. every irrational number is real number
d. every real number is a rational number

A.Fractions and decimals are not integers. All whole numbers areintegers (and all natural numbers are integers), but not all integersare whole numbers or natural numbers. For example, -5 is an integerbut not a whole number or a natural number. 
B.A number is rational if it can be represented as p q with p , q ∈ Z and q ≠ 0 . Any number which doesn't fulfill the above conditions is irrational. It can be represented as a ratio of two integers as well as ratio of itself and an irrational number such that zero is not dividend in any case
C.In mathematics, an irrational number is any real number that cannot be expressed as a ratio of integers. Irrational numbers cannot be represented as terminating or repeating decimals.
D.The correct answer is rational and real numbers, because all rational numbers are also real. Correct. The number is between integers, so it can't be an integer or a whole number. It's written as a ratio of two integers, so it's a rational number and not irrational.
                                           Witch one do u think it is??

import java.util.*;

import java.text.*;

class CreditCardBill

{

public static void main(String[] args)

{

Scanner sc = new Scanner(System.in);

NumberFormat defaultFormat = NumberFormat.getCurrencyInstance(Locale.US);

System.out.println("CS Card International Statement");

System.out.println("");

System.out.print("Previous Balance: $");

double prevBalance = sc.nextDouble();

System.out.print("Additional Charges: $");

double addCharges = sc.nextDouble();

double interest;

if(prevBalance == 0)

interest = 0;

else

interest = (prevBalance + addCharges) * 0.02;

System.out.println("Interest: "+defaultFormat.format(interest));

double newBalance = prevBalance + addCharges + interest;

System.out.println("New Balance: "+defaultFormat.format(newBalance));

double minPayment;

if(newBalance < 50)

minPayment = newBalance;

else if(newBalance <= 300)

minPayment = 50.00;

else

minPayment = newBalance * 0.2;

System.out.println("Minimum Payment: "+defaultFormat.format(minPayment));

}

}