If \(x, y,\) and \(z\) are positive integers and \(3x = 4y = 7z,\) then the least possible value of \(x + y + z\) is

[Vincen]

If \(x, y,\) and \(z\) are positive integers and \(3x = 4y = 7z,\) then the least possible value of \(x + y + z\) is

A. 33
B. 40
C. 49
D. 61
E. 84

Answer: D

Source: GMAT Paper Tests