Platform Analytics optimizes historical data collection by executing one query per indicator source per day, regardless of how many indicators reference that source. If 10 indicators share the same daily indicator source, the system executes only one SQL query per day, not one per indicator.

Over a 30-day historical collection period, this results in 30 SQL queries total. This optimization significantly reduces database load and improves performance. ServiceNow documentation explicitly highlights this behavior as a best-practice advantage of reusing indicator sources. Therefore, option C is the correct and documented answer.