Final answer:
The document with two or more addressees designed for each to be aware of the others is likely a memorandum or a multi-recipient letter common in business settings. The subject line must be clear, and consideration for the need of secondary audiences is crucial. Lengthy or complex messages might be better handled in person.
Step-by-step explanation:
The document described in the student's question, which has two or more addressees, whether delivering action or information, and is created with the awareness that each addressee should know of the other recipients, is typically known as a memorandum or a multi-recipient letter. This type of correspondence is often seen in professional or business settings where communication is sent to multiple stakeholders or team members. When drafting this type of document, the sender must ensure that the subject line is clear and specific, so the recipients understand the context and importance. Additionally, the writer should consider who the readers are, the objective of the message, and if there's a need to acknowledge secondary audiences.
It's important to consider whether the communication should be handled in person, especially if the message is complex or sensitive. If an email is too lengthy and crosses over 200 words, it may be more appropriate to discuss the matter via telephone or in person. On the other hand, if an email is the chosen medium, the writer should carefully compose and proofread the message to ensure its clarity and effectiveness.