If \(n\) is positive, \(\dfrac{n}{m} = 4\) and \(mn = 9,\) then \(m =\)

A. \(\dfrac16\)

B. \(\dfrac23\)

C. \(\dfrac32\)

D. \(6\)

E. \(\dfrac{27}2\)

Answer: C

Source: Princeton Review