<em>Answer: Frequency and severity risk rankings suggest five food safety hazards of greatest concern across all modes of transport: (1) lack of security; (2) improper holding practices for food products awaiting shipment or inspection; (3) improper temperature control; (4) cross-contamination; and (5) improper loading practices</em>
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The Mound Builders used metal tools, and were probably metal builders. Based on that information I would say the answer is B.Copper, because copper is a metal.
Juice world and wishing well
I think it might be B, I remember reading that somewhere, but the whereabouts allude me. I hope I helped :)
