Why do you think Marco Polo is considered one of the first innovators in what would later become supply chain management and TDL?

It's because he was among the first people who popularized the practice of supplying goods/products from cheaper area to a more expensive area.

Explanation:

He was a famous traders during the time when the silk road was really popular. For example He collected spices from india and transferred to the ports in Middle East. After that , he transferred the product again to European nations with higher price.

His practice is adopted by many modern countries' supply chain to this day. Big Amercian companies often collect their material and resources from less developed countries and sell it to american market with higher price.

Using the same cutting board for raw chicken and raw beef is cross - contamination. cross- contamination is the process by which bacteria or other microorganisms are unintentionally transferred from one substance or object to another, with harmful effect.