Which tier in Oracle E-Business Suite is responsible for storing application data?（）

A.It can run entirely on the Internet.
B.A minimum of two modules needs to be implemented for an organization.
C.It is engineered to work as an integrated system on a single IT infrastructure.
D.It supports multi-directional flows of business information within an organization.

A.processes user response
B.processes function activities
C.passes information to Notification Mailer
D.sends event information to a workflow process
E.include the task of executing custom code on the event information