Read the chapter$$s closing case, and then answer the question.

chapter$$s closing case

Which implication for action for savvy managers emerges from this case study?

a$.$ Savvy managers understand that successful exports are valuable, unique, and hard$-$to$-$imitate products generated by certain firms from a nation.

b$.$ Managers must be politically active to demonstrate, safeguard, and advance the gains from trade and pay attention to the pains from trade.

c$.$ In international trade, the savvy manager's number$-$one job is to leverage comparative advantage of world$-$class locations.

d$.$ Managers must constantly monitor and nurture the current comparative advantage of a location and take advantage of new promising locations.