Which format is used to validate and transform a date field in the calculated field workspace?

The correct answer is based on the functionality of the date formatting and transformation functions within the calculated field workspace. The function format(date(dateField, "dd/MM/yyyy"), "MM/dd/yyyy") processes the given date field in the specified initial format and then reformats it into the desired output format.

What happens here is that the date(dateField, "dd/MM/yyyy") interprets the incoming dateField, converting it from the "dd/MM/yyyy" format into a date object. This step is essential as it ensures that the data is recognized as a specific date rather than just text. Subsequently, applying format(..., "MM/dd/yyyy") takes this date object and transforms it into the format specified, which is "MM/dd/yyyy". This transformation accurately represents the date in the desired format while leveraging the initial parsing to ensure the data integrity of the date.

The other options do not fulfill the requirements correctly either because they attempt to convert dates in formats that do not correspond correctly with the transformations intended or lead to inconsistencies in format application, thus failing to effectively validate and transform the date fields as per specifications.