Statement: In recent years, almost 40% of the villages downstream of a large dam have experienced waterlogging during heavy rains. Experts argue that poor drainage planning around the dam is the primary cause, while farmers complain that stagnant water is damaging nearly 25% of their annual crops and affecting livelihoods.
Actions
I. Drainage systems around dams should be improved to reduce waterlogging.
II. Building more dams in the region will solve the issue of waterlogging.
III. Waterlogging has a direct negative effect on agriculture and farmers’ income.
IV. Heavy rainfall is not the cause of waterlogging in this region.
Which of the following should be the necessary step to avoid this problem?

Correct option is C

Explanation:
Conclusion I follows because experts directly recommend improving drainage.
Conclusion III follows because farmers report damage to crops and income.
Conclusion II is illogical (more dams will not solve the problem).
Conclusion IV is partly true but too absolute, the statement says poor drainage is the main cause, not that rainfall plays no role.