The millennials are the largest generation in U.S. history and, according to a recent study, 80% of them use mobile phone as their primary form of communication. As a result of millennials entering the market for mobile phones, the market demand for _______. a. landline phones remains constant, but we observe a movement upward and to the left along the demand curve b. mobile phones shifts to the right c. landline phones shifts to the right d. mobile phones remains constant, but we observe a movement downward and to the right along the demand curv