Select ALL of the following that are valid statements in Java. $($Assume that the variables x$,$ y$,$ z$,$ a$,$ and b are all int variable that have already been created and given values.$)$

Question $3$ options:

A$)$

x $=$ a $+$ b $+$ b;

B$)$

x $=$ a $+$ b;

C$)$

x $+$ y $=$ a $+$ b;

D$)$

x $+$ y $=$ b;

E$)$

x $=$ a $+$ b $=$ y;