If the following (which does compile) is executed, what is displayed on the standard output? 
   System.out.println("" + 1 + (2 + 3) + "4" + 5 + 6 + "7 + 8" + 9);
(a) 123456789
(b) 1234567 + 89
(c) 154117 + 89
(d) 154567 + 89
(e) 64567 + 89

Select the most appropriate answer.