What should you do to access the returned tabular data after starting execution of a command that runs asynchronously? (Choose all that apply.)
1. Call the EndExecuteNonQuery method.
2. Call the EndExecuteReader method.
3. Wait for the StatementCompleted event to fire and iterate through the DataReader.
4. Wait for the StatementCompleted event to fire, call the EndExecuteReader method,and then iterate through the DataReader.