Which of the Following Is Not a Way to Increase

Which of the following is not a way to increase the lifetime value of existing customers?

A) Extend the range of goods and services they buy from you.
B) Retain their business for longer.
C) Sell them more expensive items than they are currently buying.
D) Sell them more of what they are already buying from you.
E) Sell them similarly priced alternative products to what they are currently buying from you.