Read the following context and choose the best option to answer the question.
Context: it s yours , not theirs , so don t worry!. Eligible for free shipping ( us only ) on orders over $ trade - in your old me for credit toward this item ! ships same business day , unless restocking .
Question: Why is the writer offering this deal on their products , with free shipping and telling the reader not to worry ?
Options: 
- None of the above choices .
 - They are doing this out of the goodness of their hearts and out of a genuine desire to help the customer find satisfaction
 - They care deeply for the customer , and they want to minimize the costs that they are exposed to
 - They are interested in gaining the trust of the reader and getting on their good side so that they will buy more products .


They are interested in gaining the trust of the reader and getting on their good side so that they will buy more products .