What should you do?

You create a list named List1.
You create two workflows named WF1 and WF2 for List1.
You need to ensure that when a new item is created in List1, WF1 starts automatically. WF2 must start automatically after WF1 completes.
What should you do?
A. Add a Replicator activity to WF2.
B. Add a SendActivity activity to WF2.
C. Create a SPWebEventReceiver event receiver.
D. Create a SPWorkflowEventReceiver event receiver.