Which One of the Following Cooperative Groups Is Using the Jigsaw

Which one of the following cooperative groups is using the jigsaw technique?

A) When studying types of mountains (volcanic, dome, fold, and block) , each student studies one type and teaches what he or she has learned to other group members.
B) When attempting to solve several challenging mathematics problems, group members brainstorm possible ways of solving each one.
C) As they prepares for a debate about capital punishment, a cooperative group decides which member will present which argument.
D) After everyone has read Shakespeare's Julius Caesar, group members divide up the scenes of the play, and each student skims through his or her scenes for examples of symbolism.