How do most organizations use teams and how does that affect their structure?

a$)$ They are organized around team$-$based activity, because being team based makes them more competitive

b$)$ Most don't use teams and their structure is completely unaffected.

c$)$ They use teams for special projects and specific things, keeping much of their hierarchical structure but supporting team activity.

d$)$ They are usually hierarchical in nature, because most companies don't want to uproot their structures to become team based.