Organize the following expressions from greatest to least by number of terms:
I x + 2xyz
II 9x2yz
III 18x2 + 5ab - 6y
IV 4x3 + 3x2 - x - 4
A III, IV, I, II
B IV, I, II, III
C IV, III, I, II
D III, II, IV, I
I x + 2xyz
II 9x2yz
III 18x2 + 5ab - 6y
IV 4x3 + 3x2 - x - 4
A III, IV, I, II
B IV, I, II, III
C IV, III, I, II
D III, II, IV, I