Which of the following lines creates a natural pause by using an em dash correctly?

"i—uh—am confused. weren’t we leaving at noon? " asked carla.
"let’s sit over—watch out! " yelled bianca as the frisbee passed over nawal’s head.
"my salad is filled with sand! " shrieked—lara.
"i don’t know what happened, suddenly— " —exclaimed ned.

Read this description of a detail from the movie i am legend. a scientist is the last man alive in a post-apocalyptic new york, where zombies have taken over and destroyed most of the population. about ten minutes into the film, the man thinks back to how the zombie creatures came to be, and how at one point he had a wife and child. which type of suspense technique did the screenwriter use? dramatic irony flashback foreshadowing special effects