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It's perhaps a nitpick, but it would be more accurate to say that invoking methods on a variable affects the state of the object referenced by that variable's value. Invoking methods never changes...

Object[] temp = {"foo", null, "bar"};
for(Object ob :temp){
if(ob == null) {
ob = "???";
} else {
ob = null;
}


The situation here is exactly the same as in (B). ob is a local...