According to a recent survey of supply chain managers, which of these social and environmental issues was the most important? Supplier diversity. Ethical issues. Energy efficiency. Health and safety.

Health and safety.

Explanation:

An effective supply chain is one that puts into consideration all factors especially the health and safety which is the most important among the social and environmental issues.

Supply chain entails the various means of getting a product from point of manufacturing to the consumers. While the health and safety is which important is because the products needs to meet certain standard to be fit for consumption.

Health and safety issues, and guidance surrounding the best way to avoid incidents, change regularly. This means that it can be difficult enough to ensure that your own workforce is safe – but when it comes to subcontractors, who may face different policies and processes on every project they work on, it can become incredibly complex.

So you always ensure that all. the channels the products so pass before its consumption meets healthh and safety standard.

it should be c, women were allowed to vote in all states because federal law supersedes state law.

"states can make their own laws, as long as they don't contradict what the federal law states. the states do not have the authority to pass a law that negates a federal law." -google

answer; protectionism fosters competition and keeps price regulated;