Livor mortis (lividity) refers to which postmortem change, and what information can it provide?
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A
The stiffening of muscles; it indicates the decedent's age at death
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B
The purplish discoloration caused by blood settling due to gravity; it can help estimate time and position of death
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C
The decomposition of soft tissue; it indicates the presence of infectious disease
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D
The cooling of the body to ambient temperature; it is used to calculate time since death