The author has created a complex expression called "Sorted Products" on the row edge, which sorts product line by Revenue for 2006.
What must the report author do to sort the members when drilling down?
A. Configure the Ancestor drill behavior on the Sorted Products expression.
B. Preserve the Sorted Products expression, but replace the underlying Product Set expression.
C. Nothing, as the default drill behavior is sufficient in this case, to maintain sorting of the children.
D. Set the behavior to Depth Based Expression, to maintain sorting at a lower level in the data source.