Use reasoning to lead to the answer of the following question:
Bill is a customer of an electric company. He calls his electric company. Why might he be calling?\nOptions:\n- order dinner\n- demand better service\n- questions\n- pay bills\n- wait in line

pay bills
A customer has to pay bills.

Being a customer and to pay bills, he might be calling his electric company.

.

So, the answer is pay bills