Given the task definition and input, reply with output. In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

[header] How to make a counterclaim to a creditor lawsuit [title] Read the complaint and summons. [step] The complaint and summons you received has important information about the lawsuit, including the name of the creditor and how much they claim you owe. [substeps] You may not recognize the name of the company that sued you. <sep> (A) If so, you should contact the person that sued you to ask. For example, if you're an intellectual property firm and have a lawsuit going on, then you would want to contact the company's chief financial officer. (B) Sometimes a creditor sells the debt to a collection agency that turns around and sues you for the money. If the company that sued you was a collection agency, look through the complaint to see if the original creditor is listed. (C) You also must make a note of the date that you are at work, as well as the amount owed to you in that period of time. Typically you don't have to worry about these types of papers alerting the creditor that you are being sued. (D) However, you might recognize the name of the individual you're suing. For example, suppose you work in a retail store and have a customer who claims that you've injured him.
B