How can a technical consultant organize multiple records with the same Effective From Date into one Fact Table record?

How can a technical consultant organize multiple records with the same Effective From Date into one Fact Table record?
A . Use a calculated column called Effective Sequence.
B . Use the Effective Sequence Special Use Type on a numeric field.
C . Use a calculated column to filter unwanted records.
D . Use the To Date Special Use Type on a date field.

Answer: B