In the Jigsaw Puzzle Classroom Technique

In the jigsaw puzzle classroom technique,

A) children work on jigsaw puzzles to foster cooperative interdependence.
B) lessons are structured so students' only access to most of the information they will be tested on is from other students.
C) lessons are structured so each student works at his or her own pace and can feel a sense of mastery.
D) lessons are structured so that groups compete for small prizes to create incentives for learning.