Which statements are true regarding the concept of problems and incidents in the fault diagnosability infrastructure for Oracle Database 11g？（）  

A、 Only the incident metadata and dumps are stored in the Automatic Diagnostic Repository （ADR）.

B、 The problem key is the same as the incident number.

C、 The database sends an incident alert to the Oracle Enterprise Manager Database Home page.

D、 Every problem has a problem key， which is a text string that describes the problem.

E、 The database makes an entry into the alert log file when problems and incidents occur.