Answer: Lack of planning
Explanation: A barrier to group problem solving is a situation that prevents a group of individuals from finding a successful solution to a problem. Barriers are usually caused by social, physical and cognitive blocks.
There is a lack of planning here, as the marketing team only conducted further research and received input on the campaign a mere day before it was scheduled to be released. Moreover they were unable to reach a resolve during the emergency meeting, proving the inadequate problem solving techniques that are in place. The discussions they were having in the meeting were also limited, as they were only discussing the financial aspects of launching vs not launching the ad, and not focusing more on the social consequences as well.