Answer:
a. No one buys typewriters anymore, but they buy PCs even to type.
Step-by-step explanation:
Value migration can be described as the change in the value-creating forces due to the migration of value from products or business models that are outmoded to business designs that able to give better satisfaction to the priorities of customers.
Therefore, the correct option is "no one buys typewriters anymore, but they buy PCs even to type" because typewriters are outmoded while PCs are the new designs.