 
 <prompt> Wetin be di disadvantage of using moving water to produce electricity?
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OPTIONS:
 (1). Power dey produce cheaply.;
 (2). Air pollution dey produce.;
 (3). Oil spills fit happen.;
 (4). Di local ecosystem fit dey disturb.; <response>: ```(4).```
Translate di text above enta Nigerian pidgin. If programming code dey inside, leave am as e be. Don't add any extra statement for your response: 