What should you create to meet the reporting requirements of the sales department?

You need to create the required relationship for the executive’s visual.
What should you do before you can create the relationship?
A. Change the data type of Sales[region_id] to Whole Number.
B. Change the data type of Sales[region_id] to Decimal Number.
C. Change the data type of Sales[sales_id] to Text.
D. In the Sales table, add a measure for Sum(sales_amount).