Which phrase in this excerpt from Kurt Vonnegut's "Report on the Barnhouse Effect" is an example of sarcasm?

1)the blessings of another world war.

2)his mother lived to be fifty-three, his father to be forty-nine

3), if he can remain hidden from his enemies.

4)typewritten on a soiled scrap of paper

5)bewildering tangle of psychological jargon