Which of the following is true for the real numbers π and \(\sqrt{2}\) ?

• A. π and \(\sqrt{2}\) both are rational numbers
• B. π + \(\sqrt{2}\) is a rational number
• C. \(\sqrt{2} \ \pi \ and \ \frac{\pi}{\sqrt{2}}\)are not real numbers
• D. \(\pi^n\) is irrational for every natural number n