Which two statements describe the behavior of the server's SQL mode？（）

A.The server‘s SQL mode determines how the server should behave when performing data validation check and interpreting different forms of syntax

B.The server‘s SQL mode determines whether the server should be read-only or should accept commands such as INSERT and UPDATE

C.The server‘s SQL mode can be changed at the session level with a SET SESSION sql_mode="new_value" command

D.The server‘s SQL mode, when globally set on a slave server, applies to events sent from the master