What should you do to schedule the pipelines for execution?

You have the following Azure Data Factory pipelines:

✑ Ingest Data from System1

✑ Ingest Data from System2

✑ Populate Dimensions

✑ Populate Facts

Ingest Data from System1 and Ingest Data from System2 have no dependencies. Populate Dimensions must execute after Ingest Data from System1 and Ingest Data from System2. Populate Facts must execute after the Populate Dimensions pipeline. All the pipelines must execute every eight hours.

What should you do to schedule the pipelines for execution?
A . Add a schedule trigger to all four pipelines.
B. Add an event trigger to all four pipelines.
C. Create a parent pipeline that contains the four pipelines and use an event trigger.
D. Create a parent pipeline that contains the four pipelines and use a schedule trigger.