Question 18





What is the output of the following code?

1:    String str = "Welcome";
2:
3:    str.concat(" to Java!");
4:
5:    System.out.println(str);

A) Strings are immutable, compilation error at line 3.
B) Strings are immutable, runtime exception at line 3.
C) Prints "Welcome".
D) Prints "Welcome to Java!".