Water density increases as salinity and pressure increase, or as temperature decreases.
Answer the question based on the following text.

Question:


As Cindy swam deeper into the ocean, it got darker and warmer or cooler? 


Text:

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multiple-choice question answering
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Water density increases as salinity and pressure increase, or as temperature decreases.
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Answer the question based on the following text.

Question:


As Cindy swam deeper into the ocean, it got darker and warmer or cooler? 


Text:

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cooler