When researchers monitored the professional accomplishments of more than 1500 highly intelligent individuals, they found that the most successful were more ambitious, energetic, and persistent than others. This best illustrates the importance of:

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.  

answer; the above statement is (false);

answer; did not understand that the act was wrong because she/he was suffering from a mental illness;