When former President Bush issued the final approval to invade Iraq, he asked whether anyone had any last thoughts or recommendations. When no one commented, the order was given. The authors give this as an example of how

a. groups can make good decisions when there is a strong leadership.
b. cohesive groups tend to disagree more frequently than groups of diverse experts.
c. groups do not always make good decisions when they are cohesive and want to please their leader.
d. groups make the best decisions when they are cohesive and want to please their leader

c. groups do not always make good decisions when they are cohesive and want to please their leader.

Explanation:

In this example, President Bush had the ultimate authority to declare war. However, he wanted to know what the opinion of others might be, in order to receive advice. Despite this, the people that surrounded him were mostly concerned with wanting to please him. Because of this, they did not make good decisions, or felt compelled to stay quiet and not share the useful thoughts that they might have had in order to preserve the unity of the group.

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.