The dash in the sentence below is
used to do which of the following?
"I worked with three of my
classmates to complete a science
project--one of my group mates
was my brother."
A. set off further detail or explanation
B. indicate an abrupt change in the sentence
C. show an abrupt, unfinished end to the
sentence
D. set off humor in an informal sentence
Explanation:When you see the dash the tone changes the sentence like this person mag not be so happy to be working with their northern they clarified that one of the people was their brother.