Which option represents the steps to accomplish this?

You are designing a load plan in which you must run Mappings A and B one after the other while running Mapping C at the same time. Which option represents the
steps to accomplish this? (Choose the best answer.)

A.
Add a parallel step, add three serial steps underneath it, then add A to the first parallel step, B to the second one, and C to the last one.

B.
Create a scenario from the variable and add the scenario to the load plan to create a case step.

C.
Add a parallel step, add two parallel steps underneath it, then add A and B to one parallel step, and C to the other.

D.
Add a parallel step, add two serial steps underneath it, then add A and B to one serial step, and C to the other.

Explanation:
(https://docs.oracle.com/middleware/1212/odi/ODIDG/loadplans.htm#ODIDG1356)