• They can sort the data by time and remove duplicate times found on entries.
• They can toggle off the possible duplicates option at the top of the chart.
• They can modify the event tag to capture a unique order ID.
• They can disable the view-through conversion data column.

The Correct Answer is: They can modify the event tag to capture a unique order ID.

Explanation: To prevent duplicate conversions in Google Ads, a marketer can modify the event tag to capture a unique order ID. When creating a conversion action, if a visitor revisits or refreshes the conversion page, Google Ads may count this as two conversions. Hence, it’s essential to include a unique transaction ID, such as an order confirmation number, in the event tag. This allows Google Ads to identify and disregard duplicate conversions with the same order ID, ensuring a more accurate conversion count.