What is the recommended way to avoid processing duplicates of the same Queue Items?

A developer creates a Dispatcher which extracts information from the top 30 mail messages in Microsoft Outlook and uploads that information into a queue.

What is the recommended way to avoid processing duplicates of the same Queue Items?
A . Create an Excel file of processed Queue Items and loop through the list to check if the current Queue Item has been processed before.
B . Add a descriptive "Reference" in the "Add Queue Item" activity and check that it does not equal the "Reference" of the Queue Item last processed.
C . Set the "Unique Reference" of the queue to "Yes" and "Auto Retry" of the queue to "No".
D . Set the "Unique Reference" of the queue to "Yes" and add a descriptive "Reference" in the "Add Queue Item" activity.

View Answer

Answer: D

Explanation:

Reference: https://forum.uipath.com/t/how-to-avoid-loading-items-onto-the-queue-twice/203715/4you