Which statement is true about Enterprise Manager (EM) express in Oracle Database 12c?（）

A. y default, EM express is available for a database after database creation.

B. You can use EM express to manage multiple databases running on the same server.

C. You can perform basic administrative tasks for pluggable databases by using the EM express interface.

D. You cannot start up or shut down a database Instance by using EM express.

E. You can create and configure pluggable databases by using EM express.