Teacher: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".
Teacher: Now, understand the problem? Solve this instance: [header] How to stop unwanted faxes [title] Call the sender and opt out from their list. [step] In the united states, the 2005 junk fax prevention act requires all fax marketers to provide a way for receivers to opt out of future faxes. Usually they will provide an opt-out telephone number, but sometimes they will provide a fax number, a website or an email address. <sep> (A) [substeps] If the sender does not mention the type of faxes, call ahead of time to see if there is an alternate method to handle this. [title] Quickly call the sender to report the bad faxes. (B) [substeps] In some cases, calling an opt-out number will not work. This typically occurs when the fax marketers are deliberately breaking or ignoring the law. (C) Providing these services could help you find the deadline to send your message and save you the annoyance. [substeps] Use the email address provided in your junk fax system to call the sender and schedule a follow-up call. (D) [substeps] If the sender calls or emails you, you will have no choice but to agree to their terms. You may also read the status of the response on the list.
Student:
B