How do you ensure that each customer name appears only once in the results?

You combine two customer master data tables with a union node in a calculation view. Both master data tables include the same customer name.

How do you ensure that each customer name appears only once in the results?
A . Define a restricted column in a union node.
B . In the union node, map both source customer name columns to one target column.
C . Add an intersect node above the union node.
D . Include an aggregation node above the union node.

Answer: C