Which of the following statements indicate advantages of sub-surface irrigation?

I. Low operation cost once established

II. Does not disturb the movement of implements

III. Permits efficient use of water

IV. easily floods the field

A. I, II and III only
B. II, III and IV only
C. I, II and IV only
D. I, II, III and IV

Correct Answer: Option B

B. II, III and IV only