Nathan measured the length of his cat. The length was a rational number. Which could be the length of Nathan's cat?

A:v27inches

B:45 inches

C: 59 inches

D 144 inches

Assume only A has the √ (square root)

b, c, d. they are all rational number

while A:v27inches,√27 = 5.196, which is irrational number

Assume A, B, C, D have √ before the number

D is the answer, as √144 = 12, which is the rational number