A university installed a new enterprise system. The university appointed an engineer as chief project manager to take care of the entire process of this project. Each department was required to follow the instructions of this person to change their functional process. This situation is an example of $\_\_\_\_\_\_\_\_$ while implementing enterprise information systems.

one:

a$.$ transition problems

b$.$ employee resistance

c$.$ the occurrence of requirement gaps

d$.$ a lack of collaborative management