Plato question please answer correctly

Select the correct answer.
Mykala is a middle school science teacher, and today she is having her class do a group activity in which they must work together to determine
the components of a compound.Each of the students within a group is assigned a separate task, so that working together they must come up
with an answer to the problem. Which of the following teaching strategies Is Mykala employing?

A differentiation of learning styles

B. in-class discussion

C.student collaboration

D.lecture method

E activities for active learning