The option is (D).
It is obvious the first question would be what is the text about,what does the author try to convey and how does he presents the facts to manage his goals.
The benefit of group work that is demonstrated in this example is enabling a complex task be broken down to simpler and fewer works. Since each individual had been given fewer task, it leads to increase of productivity while saving the time consumed in finishing the project.
Answer: i would go with imagination is the power behind creation
