Options:
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Earlier discussion
2 older comments kept for context.
Hanif
The farmer can only contact cholera if he drinks from the water, or else he can't contact it.
isaac alamu
A is the correct option,there are water in the swamp but all the water there are affected with disease. the water are dirty, and drinking this type of water. the farmer will surely contact cholera, but if the farmer did not drink nor eat any food there, surely the farmer will not contact cholera. THE CORRECT OPTION IS OPTION A.(CHOLERA)