2. Which of the following developed after the Paleolithic Age? A. language
B. farming
C. art
D. tools

A

Explanation:

After Prehistory, which includes the Paleolithic, Mesolithic and Neolithic, the Bronze Age is the first period of « Protohistory », also called the « Metal Ages ». Marked by significant technological and social advances, the Bronze Age was an important step in the evolution of European societies.

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.  

you answered your own : -/