What are some best practices when developing calculation views? Note: There are 2 correct answers to this question.

What are some best practices when developing calculation views? Note: There are 2 correct answers to this question.
A . Model star schemas using a sequence of join nodes.
B . Aggregate at the lowest possible node.
C . Include all data flow logic within one calculation view.
D . Avoid defining joins on calculated columns.

Answer: B, D