Which implication for action for savvy managers of multinational enterprises $($MNEs$)$ is most closely related to decisions that led to the KFC$$Yum China case?

a$.$ MNEs should move their headquarters to countries governed by more market$-$friendly rules.

b$.$ Understand and master the external rules of the game governing MNEs and home$-$country$/$host$-$country environments.

c$.$ Develop learning and innovation capabilities to leverage multinational presence as an asset$"$think global, act local."

d$.$ Understand and be prepared to change the internal rules of the game governing MNE management.