Which of the Following Is a Disadvantage of Network Structures

Which of the following is a disadvantage of network structures?

A) The central core of network structures is relatively small and the surrounding networks tend to expand or shrink continuously.
B) There is a potential to experience a lack of loyalty among contractors who are used infrequently.
C) A network structure is characterized by lack of flexibility which leads to problems while dealing with changing environments.
D) Network structures are broad and complex.
E) Network structures tend to increase overheads of an organization and reduce its operating efficiency.