We will address the issue promptly; thank you for your ______.

• A. Assistance
• B. Heads
• C. Flagging
• D. Attention

Answer: (D)

Choosing the right closing phrase in professional writing hinges on signaling what you value from the reader—their focus and consideration. In this sentence, the best word to complete the thought is attention. Saying “thank you for your attention” acknowledges that the reader has listened to or considered the issue and offers a courteous sign-off that fits a formal, respectful tone. It aligns with the promise to address the issue promptly, reinforcing that you appreciate the reader’s engagement as you follow through.

The other options don’t fit as well. Assistance would thank the reader for help already given, which changes the tone to one of gratitude for external support rather than acknowledgment of the reader’s attention. Heads is informal and unsuitable for a professional closing. Flagging would imply a request related to marking or signaling something, which isn’t a natural way to close a message that conveys action will be taken.