Christopher,a Young Manager,heads a Team of 13 Members Who Work

Christopher,a young manager,heads a team of 13 members who work together on a technical project.He finds that his team is not able to generate creative ideas lately.According to Brown and Paulus (2002) ,which of the following ways should Christopher most likely adopt to enhance group brainstorming in this scenario?

A) motivate brainstormers to speak and listen to one another
B) have group members interact by writing
C) admonish brainstormers "not to criticize"
D) encourage group members to express their differences verbally