I think your answer is b.
The Tet offensive proved that not only did the Viet Cong have the desire to fight back, but also the ability. It killed many US soldiers and set the war strategies back a bit. This added deeper conflict and dread to American fighters as well as American civilians.
A workflow is the series of activities that are necessary to complete a task. A facilities workflow is comprised of the set of processes it needs to accomplish, the set of people or other resources available to perform those processes, and the interactions among them. It is important for facilities to support continuous workflow so that there will be no interruptions and the team can work coherently with each other.
I think they are synonyms
