Consider the Following Two Lines of Code

Consider the following two lines of code. What can you say about s1 and s2?
String s1 = "testing" + "123";
String s2 = new String("testing 123") ;

A) s1 and s2 are both references to the same String object
B) the line declaring s2 is legal Java; the line declaring s1 will produce a syntax error
C) s1 and s2 are both references to different String objects
D) s1 and s2 will compare "equal"
E) none of the above