Many Retailers That Have Been Outstandingly Successful in Their How

Many retailers that have been outstandingly successful in their how markets have experienced much poorer performance when they have entered overseas markets.These include: Tesco,Marks& Spencer,Laura Ashley,and Body Shop in the UK) ; Best Buy,Sears,Macy's,and Wal-Mart in the US.This reflects:

A) The lack of major efficiency benefits from international scope in retailing.
B) The lack of scale economies in retailing.
C) Limited opportunities for exploiting learning benefits in retailing (e.g.by transferring best practices) .
D) The lack of major efficiency benefits from international scope combined with the need for national differentiation.