The Textbook Advocates the Use of Student Discussions for Promoting

The textbook advocates the use of student discussions for promoting co-construction of meaning. Which one of the following student interactions is most likely to be effective in fostering co-constructed meanings?

A) Two students work together on a crossword puzzle that includes the week's new spelling words.
B) The students in a cooperative learning group discuss different ways of solving a certain math problem.
C) When a French teacher begins class by saying,"Comment allez vous?" the students reply in unison,"Trés bien."
D) Two students help each other prepare for a quiz by giving each other practice test questions.