Q4 Multiple choice Mark for later Which of the following statements about aggregates is true? (2) Select all that apply. A Aggregates can only be created for Basic Cubes B Aggregates are stored as a single transparent table, which houses the aggregated data C Aggregates can be created on dimension characteristics and navigational attributes D Several dimension characteristics used in an aggregate always have the same aggregation level E Aggregates reduce the number of key figures Correct answer