Why would you use phantom assemblies? Note: There are 3 correct answers to this question.

Why would you use phantom assemblies? Note: There are 3 correct answers to this question.
A . To make the assignment of components easier
B . To simplify the structure of bills of material
C . To reduce the number of changes required in bills of material
D . To increase the number of planning levels
E . To reduce the number of material masters

Answer: A,B,C