Why might you use the Keep Flag property in an aggregation node?

Why might you use the Keep Flag property in an aggregation node?
A . To ensure that the aggregation behavior defined in the aggregation node for a measure CANNOT be overridden by a query
B. To retain the correct aggregation behavior in stacked views
C. To include columns that are NOT requested by a query but are essential for the correct result
D. To exclude columns that are NOT requested by a query to avoid incorrect results

View Answer

Answer: C