14. Which of the following statements is true about the value of 2? A. It is a rational number. B. The principal root is 2. C. It lies between 2 and 3. D. It is an irrational number. 15. Which of the following statements is true about the value of 81 ? A. It is a rational number and the principal root is 9. B. It is a rational number and the principal root is 18. C. It is an irrational number and it lies between 8 and 9. D. It is an irrational number and it lies between 9 and 10.​