Brainstorming is so much a part of the culture at Ideo that it has its own set of beliefs about what makes brainstorming work best. Ideo has created the Apple mouse, the Palm V, and Oral-B toothbrush. All of the following improved Ideo's brainstorming except:

a. morning vs afternoon meetings
b. group sizes of 6 to 10 people
c. creativity awards
d. cookies during meetings