Platform Analytics supports unit conversion for duration-based indicators through the Unit field on the Indicator record. When an indicator stores duration values (such as milliseconds), setting the Unit to Hours automatically converts and displays the values correctly without modifying the underlying data or recollecting scores.

Using formulas or scripts is unnecessary and discouraged when a built-in unit conversion is available. The Formula box is intended for mathematical aggregation logic, not unit conversion. ServiceNow documentation explicitly states that duration indicators should rely on the Unit setting to control how values are displayed, making option A the correct and supported approach.