Final answer:
The text classifies complements of sentences as cause, purpose, or hypothesis.
Explanation:
In the provided text, the complements of sentence are classified as expressing cause, purpose, or hypothesis:
- Cause: Rio de Janeiro is deserted due to an epidemic of madness.
- Reason/Purpose: The residents fled because they believed they were being pursued by vampires.
- Hypothesis: If we believe the witnesses, these evil beings feed on the soul of humans. Scientists were sent there to study the causes of this madness, assuming it is possible.
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