Use Out when

• A. Use Out when expecting a reply
• B. Use Out when the conversation is complete
• C. Use Out when you want acknowledgment
• D. Use Out when you need to ask another question

Answer: (B)

The main idea is signaling that you’re finished with the discussion. Use Out to close the conversation when you’ve conveyed everything needed and you don’t expect or require a reply. It tells the other person that no further input is necessary and the thread is complete. It wouldn’t fit this use if you’re still waiting for an answer, seeking acknowledgment, or planning to ask another question, because in those cases the dialogue isn’t truly finished yet. For example, after you’ve confirmed all actions are complete and no follow-up is required, you’d send an Out to mark the end of the exchange.