The strict guidelines for U$.$S$.$ companies when acquiring and using "conflict minerals" from the Democratic Republic of Congo emphasize what essential lesson for managers?

Multiple Choice

Culture plays little part in ethical behavior around the globe.

Almost every country follows the same guidelines in conducting business.

Companies should avoid doing business in any country prone to ethical lapses.

Business ethics should be a local concern, not an international one.

Companies must identify, establish, and enforce ethical standards everywhere they do business.