Which of the following is true of an international strategy? a) it is most appropriate when there are substantial differences across nations with regard to consumer tastes and preferences. b) it is used by firms that try to achieve low costs through location economies, economies of scale, and learning effects. c) it involves taking products first produced for their domestic market and selling them internationally with only minimal local customization. d) it is the most difficult strategy to pursue because it places conflicting demands on the company. e) it makes most sense when there are strong pressures for cost reductions.