A. Reduced span for cultivation
B. Less variety of crop for cultivation
C. Increased salinity of farm land
D. Increased crop success and yield

Ans. (d) : Increased crop success and yield

Explanation:-
Advantages of irrigation–
(i) Stabilized yield of crops
(ii) Protection from famine
(iii) Improvement of cash crops
(iv) Prosperity of farmers
(v) Source of revenue
(vi) navigation
(vii) Hydraulic power generation
(viii) water supply
(ix) Development of fishery