Lower-level managers who possess are effectively able to complete daily activities, and earn more credibility from their subordinates than comparable managers without them.

Technical skills

Explanation:

Technical skills  is the ability to perform field specific work through knowledge and tools. Managers are supposed to perform the skills like, managing problems and finding solutions, communicating with staff and other members, coordinating tasks, controlling processes etc.

Low-lever managers are found with these technical skills which helps them in proper management of event and regulating tasks in effective manner in comparison with the managers with the abilities.

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.