Which One of the Following Statements Is TRUE

Which one of the following statements is TRUE?

A) It's far more difficult to keep old customers than to attract new ones.
B) It's far more expensive to attract new customers than to keep older ones.
C) It's about the same in terms of expense to attract new customers and keep older ones.
D) It's far more expensive to keep older customers than to attract new ones.
E) It's cheap to attract new customers and keep older ones.