Select the correct answer from each drop-down menu. The number 72 lies between the perfect squares . So, the square root of 72 lies between the numbers, which means the square root of 72 is .
A. 49 and 64, 7 and 8, a whole number
B. 64 and 81, 8 and 9, a whole number
C. 36 and 49, 6 and 7, an irrational number
D. 81 and 100, 9 and 10, an irrational number