• Toggle off the possible duplicates option at the top of the chart.
• Disable the view-through conversion data column.
• Sort the data by time and remove duplicate times found on entries.
• Modify the event tag to capture a unique order ID.

The Correct Answer is: Modify the event tag to capture a unique order ID.

Explanation: To rectify the issue of duplicate conversions after adding a conversion tracking tag to a landing page, it is recommended to modify the event tag to incorporate a unique order ID. This is because, if a user revisits or refreshes the conversion page, Google Ads may erroneously count that as multiple conversions. By capturing a unique transaction ID in the event tag, Google Ads can accurately identify and discount any duplicate conversions, leading to a more accurate conversion count.