0 The following are beta's for a Microsoft during four time periods. Compare the four estimated betas. What do you conclude about how Microsoft's exposure to systematic risk has changed over that 20-year period? What do you think explains the change? 1.4742 0.8493 1987-1991: 1992-1996: 1997-2001: 2002-2006 1.5633 1.0491 Which of the following statements is true? (Select the best choice below.) O A. Microsof's systematic risk decreased in the early 1990s as Microsoft established itself as the dominant operating system compary, but increased during the Internet bubble in the late 1990s (when toch stocks were soaring). It has since decreased OB. Microsoft's systematic risk decreased in the early 1990s as Microsoft established itself as the dominant operating system company, but increased during the internet bubble in the late 1990s (when tech stocks were soaring). It has since increased. O c. Microsoft's systematic risk decreased in the early 1900s as Microsoft established itself as the dominant operating system company, and decreased during the Internet bubble in the late 1990s (when toch stocks were soaring). It has since increased OD. Microsoft's systematic risk increased in the early 1990s as Microsoft established itself as the dominant operating system company, but increased during the Internet bubble in the late 1990s (when toch stocks were soaring). It has since decreased Click to select your