Definition: 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".
Input: [header] How to address wedding invitations to a family [title] Decide whether to do double-envelopes. [step] If you are planning a more informal affair, it's okay to go with just one outer envelope. That way your invitees with open the envelope and see your invitation right away. <sep> (A) However, if you are planning an intimate, burlesque event and don't have a formal invitation, do this as a last resort. Double-envelopes are most secure when they are signed by a member of a particular organization that does weddings for ordinary families or groups. (B) If you prefer formality and tradition, opt for the double-envelope method. This means that your invitees will need to open two separate envelopes before seeing the event details. (C) [substeps] Double-envelopes are especially useful for a more formal event like a reception. Some areas of the reception are more informal so a single envelope is easier to find. (D) But if you are planning a more informal affair (usually much closer to a wedding reception) you might think twice about taking double-envelopes-some brides are pretty strict about this rule and compete for privacy among their loved ones. [title] Decide who to include in the invitation.
Output:
B