Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Tons of rotting fish have filled a lagoon in Rio de Janeiro, Brazil where Olympic rowing and canoeing events will be held during next year's Games. Over the past week, thousands of the silver fish have died and have been scooped out of Rodrigo de Freitas lake, but city authorities and biologists have argued about the cause. More than 37 tons of fish have been collected, according to Rio's waste management company, but there is still an overwhelming stench, sparking complaints from neighbours and passers-by. Clearing: Rio's waste management company said it has cleared more than 37 tons of fish, which have been taken to the city's main dumpTons of dead fish are being cleared from a stinking lagoon in Rio de Janeiro, Brazil, which will host Olympic eventsRotting silver fish have filled Rodrigo de Freitas lake where rowing and canoeing events should take place next yearThere is an overwhelming stench and authorities and biologists have argued about about the cause of the deaths 
 Question:The die-offs are common in _, where rivers, lakes and even the ocean are blighted by raw sewage and garbage.

Rio de Janeiro