the author highlights five common obstacles to data-driven marketing (Chapter 2). Which of these five obstacles; getting started, causality, lack of data, resources and tools or people and changewould you suggest are the most difficult to overcome? Explain your answer Which of these obstacles getting started, causality, lack of data, resources and tools or people and change are the easiest to overcome? Explain your answer. Do you think these obstacles apply to both small and large firms? Explain your