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". 
Q: [header] How to find a penpal [title] Think about what you want to send. [step] There are many different ways to correspond with a penpal, and deciding on the one that's right for you makes it easier to sort through the number of penpal websites on the internet. Some people prefer communicating electronically while others like to use penpals as a means of creative communication. <sep> (A) [substeps] The international union of mail-artists is a website dedicated to those who like sending postal art to their penpals. Iumoa is a much more niche community as it has roughly 4 , 000 active members. (B) Read the different penpal websites carefully and decide on the one you wish to write a message for. [title] Enter the number and contact information you would like to use in the address bar (in the upper right hand corner of the web page). (C) [substeps] Remember that there is no set password to choose from across a thousands of websites, but feel free to use whatever feels most comfortable for you. [title] Narrow the search criteria to near the lowest classifications. (D) Some people like to send messages on social media or email, while other people prefer to send text messages or instant messages. [title] Decide which websites you want to find.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
A