How does specialization affect an economy?

it results in more innovation.
it makes the economy less efficient.
it prevents duplication of effort.
it discourages entrepreneurs.

It prevents duplication of effort.

Explanation:

Specialization can lead to economies of scale because it allows for increased output. ... This supports growth as a specialization of labor, for example, allows workers to perfect one task rather than focus on many. As workers become more adept at a specialized task, they become more efficient and production increases.

answer; analytical,creative and practical;

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.