Which of the Following Statements Is TRUE

Which of the following statements is TRUE?

A) The Southwest Airlines culture encourages employees to have cross-departmental collaboration, which results in reduced turnaround time.
B) Zappos has a tall hierarchical structure that promotes centralized decision making.
C) McDonald's used organic structure to promote decentralized decision making to solve real-time problems.
D) Most of the small and less complex organizations use a functional structure.