QUESTION 18 Including a transaction identifier in the fact table is often referred to as: O Degenerate dimension Aggregated fact table Galaxy of stars QUESTION 19 T/F: A drawback of independent data marts is difficulty in obtaining consistency between data marts. True O False QUESTION 20 T/F: data warehouse s normalized, ts dependent data marts also must be normalized. s normalied, its dependent data marts also must be normalized. True ralse