Which information does the reader know before it is revealed to another character in the play​

Read this excerpt from tim o’brien‘s “ambush” “i had already pulled the pin on a grenade. i had come to a crouch” which literary device is most clearly shown in this excerpt?

Tobias wolff most likely named his short story "mortals" because the story explores the theme of people coming to terms with the idea that one day they too will die. wanting to find out what their loved ones really think of them. achieving immortalit by being "big people" while they are alive. hoping that they will have accomplished something before they die.

Isaw him _ .(a)danced (b)dance (c)dancing