Select the correct answer from each drop-down menu. Laina is crime scene investigator. She knows that all biological physical evidence must be handled carefully until trial. What two things must
make sure to do with biological evidence?
Laina knows that all biological physical evidence must be kept at the proper
to preserve its stability and in the proper
to avoid cross contamination.
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to preserve its stability.

to avoid cross contamination.

Explanation:

Biological evidence refers to all biological materials such as hair, tissue, bones, teeth, blood or other bodily fluids etc. These biological materials are collected from the site of crime. These evidences helps in finding the criminals. These biological evidences has to be kept at safe place in order to avoid contamination and preserve its stability so it can be used for solving the problem.

bc blah

explanation:

bc blah