Final answer:
If a new field is added to an object in Salesforce and the metadata index is refreshed, the field should appear on the grid. The statement is likely false and could indicate a procedural error or technical issue.
Step-by-step explanation:
The statement Ana added a new field to the account object in her sandbox. After refreshing the metadata index from the commit changes page, the field is not showing on the grid is likely False. When a new field is added to an object in a Salesforce sandbox, and the metadata index is refreshed, the new field should appear on the appropriate grid, assuming there are no permissions issues or other errors. If the field is not visible, this could be due to a number of factors such as the field not being added properly, the page layout not being updated to include the new field, caching issues, or the need for a hard refresh of the browser.