This question refers to the following declaration:
String line = "Some more silly stuff on strings!";
//the words are separated by a single space
What string will str refer to after execution of the following?
int x = line.IndexOf("m");
String str = line.Substring(10, 5) + line.Substring(25, 0 + x);
(A) "sillyst"
(B) "sillystr"
(C) "silly st"
(D) "silly str"
(E) "sillystrin"