A key learning from the article, "Customer Intimacy and Other Value Disciplines," is:a$)$ Companies should endeavor to master all three customer value disciplines simultaneouslyb$)$ Pursuing customer intimacy will always make products and services more costly to producec$)$ Manufacturing companies must adopt operation excellence as a value discipline and service$-$based companies must adopt customer intimacyd$)$ If a company decides to switch from one customer value disciplines to another, the change will not affect any of the inner processes of the company, only the company's outward marketing and brand perceptione$)$ Companies that divide their focus between multiple value disciplines find that they lose their ability to create value and retain customers