You need to make structural changes to the cube. You also need to ensure that appropriate aggregations are created after the changes are made. What should you do?（）

A.Record a weeks user activity by using SQL Profiler. Apply structural changes. Replay the activity and then run the Usage Based Optimization Wizard.
B.Apply structural changes. Run the Database Engine Tuning Advisor.
C.Apply structural changes. Run the Usage Based Optimization Wizard.
D.Record a weeks user activity by using SQL Profiler. Apply structural changes. Run the Database Engine Tuning Advisor.