Final answer:
T-Mobile will buy out a customer's contract if they sign a new two-year contract with T-Mobile.
Step-by-step explanation:
The correct answer is A) Sign a new two-year contract with T-Mobile. T-Mobile will buy out a customer's contract if they are willing to sign a new two-year contract with T-Mobile. This means that the customer agrees to stay with T-Mobile for the next two years, and in return, T-Mobile will pay the cost of terminating their contract with their current carrier.