In addition to samples taken from a body, what other information or evidence could point to poisoning as the cause of death?

Explanation:

In addition to the biological samples taken from the body like viscera, blood, urine, bones and others. The non-biological samples like containers containing position, syringe, pills, bottles and others found in the close proximity or in the crime scene must also be collected. The non-biological samples can be directly related to the kind of poison taken or given to kill the victim and can be useful in determining the cause of death.

c is the correct answer!