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A way in which science has improved a societal problem.

Acontaminated water being purified
Bpathogens becoming resistant to antibiotics
Cbacteria contaminating food
Dunknown diseases appearing in some areas

Verified Answer :

A way in which science has improved a societal problem is
Contaminated water being purified
because science has invented many new techniques to purify water by chlorination or some other methods
so correct option is A 
hope it helps

Answer:

contaminated water being purified

Explanation:

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