Read the chapter's opening case, and then answer the question.

chapter's opening case

Successful common markets such as the one discussed in this case contribute to the fact that the majority of multinational enterprises $($MNEs$)$ generate most of their revenues in their home region $($such as within the EU$).$ Which implication for action would therefore be most closely associated with this case?

a$.$ Think regional, downplay global.

b$.$ Remember that regional integration may result in some loss of sovereignty.

c$.$ Be aware that regional integration is a form of protectionism centered on $"$us versus them."

d$.$ Understand the rules of the game, at both global and regional levels, and endeavor to positively influence them.