Which of the following descriptions about the view library system interface is wrong?

Which of the following descriptions about the view library system interface is wrong?
A . All levels of video information databases are interconnected through cascading interfaces
B . Cross-level fortification information interaction needs to be completed through the corresponding interface, and non-cross-level fortification information interaction can be completed without the corresponding interface.
C . Depending on the data of each subsystem of the library, the information interaction needs to be completed through the corresponding interface
D . Through the collection interface, the video data can be collected into the video information database

Answer: A