What should Marisa do to quickly identify duplicates in her list?

To quickly identify duplicates in her list, Marisa should use conditional formatting with the "highlight cells rule" for "duplicate values." This method allows her to visually emphasize any duplicates directly within the worksheet, making it easy to spot them at a glance. By applying this formatting, any cells containing duplicate entries will be automatically highlighted, which streamlines the process and reduces the time spent searching for repeated data.

This approach is particularly effective because it does not require manually sorting or filtering the data, which can be more time-consuming and may not provide immediate visual feedback on duplicates. Additionally, simply printing the worksheet would not aid in identifying duplicates; it might even create an unnecessary waste of resources and does not provide a practical or efficient way to address the problem. Ignoring duplicates is not advisable, as it can lead to inaccuracies and complications in data analysis, undermining the integrity of Marisa’s findings.