How can you see which part of the operations is pushed down to the source database?

The performance of a dataflow is slow in SAP Data Services.

How can you see which part of the operations is pushed down to the source database? Note: the are 2 correct answers to this question.
A . by opening the auto documentation page in the Data Services Management Console
B . By enabling corresponding trace options in the job execution dialog.
C . By opening the dataflow and using the view optimized SQL feature.
D . By starting the job in debubg mode.

Answer: B,C