What is true about the given assignments below?

String s$1=$ new String$("$hello$")$;

String s$2=$ new String$("$hello$")$;

boolean flag $=$ s$1==$s$2$;

A$.$ value of flag is true

B$.$ value of s$1.$substring$(3)$ is same as value of s$2.$substring$(3)$

C$.$ A and B

D$.$ Any of the strings can be changed by using the replace methods of the String class

E$.$ None of the above