What is the most effective way to train the System Team members to operate effectively as part of the train?

What is the most effective way to train the System Team members to operate effectively as part of the train?
A . Have them attend Leading SAFe training and Scrum Master orientation.
B . Have them attend Leading SAFe training.
C . Have them attend SAFe for Teams training with all other teams on the train.
D . Have them attend Implementing SAFe training with SPC certification.
E . Have them review the SAFe Foundations presentation and provide on-the-job training.

Answer: C