There were many new nurses working on the unit, and many of them were from other countries. The manager became aware of many difficulties that seemed to be arising from this cultural diversity. She decided to get the staff together to talk about the differences and commonalities and decide on a plan to educate every one working on the unit about the different cultures. This is an example of what kind of problem-solving technique?

A. Seven hats.

B. Pros and cons.

C. Brainstorming.

D. Concentric circles.