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 shifts to the right b. mobile phones remains constant, but we observe a movement downward and to the right along the demand curve c. mobile phones shifts to the right d. landline phones remains constant, but we observe a movement upward and to the left along the demand curve