Final answer:
The most suitable subject line for a direct request in a business context is 'Incorrect order no. MB554-14 shipped' as it is both clear and contains specific details like the order number for quick reference and resolution.
Step-by-step explanation:
When crafting a subject line for a direct request, particularly in a professional or business setting, it is crucial to be clear and specific to ensure the message is understood and the issue is addressed promptly. Of the options provided:
- 'Incorrect order no. MB554-14 shipped' is specific and immediately alerts the reader that an order was shipped incorrectly and provides an order number for quick reference.
- 'Need correct color mini blinds' is clear about the need but does not provide details such as the order number or what was incorrect about the shipment.
- 'Mini blinds incorrectly labeled' indicates there was a problem with labeling, but it does not specify what aspect of the order is incorrect or provide an order number.
Considering these aspects, the most suitable subject line would be 'Incorrect order no. MB554-14 shipped' because it concisely conveys both the issue (incorrect order) and provides a specific reference (order number), which is essential for efficient resolution.