Final answer:
The preferred packaging container for evidence collection in the investigation of a fire is a clean glass jar with a tightly fitting lid. Glass is non-reactive and does not contaminate the evidence.
Step-by-step explanation:
The preferred packaging container for evidence collection in the investigation of a fire should be a clean glass jar with a tightly fitting lid. This is because glass is non-reactive and does not contaminate the evidence. A plastic bag (option A) may introduce contaminants and is not a suitable choice. A new paint can (option B) can also introduce contaminants and may react with certain evidence. A plastic container (option D) can also introduce contaminants and may react with certain evidence.