What was a fundamental problem with the introspectionist school of psychology?

Answer and Explanation

Introspection was Method by which trained observers carefully reflect and report on their mental experiences.

The fundamental problem with the introspectionist school of psychology was that the use of introspection as an experimental technique was often criticized because Introspection was limited in its use; complex subjects such as learning, personality, mental disorders, and development are difficult or even impossible to study with this technique and also different observers often provided significantly different responses to the exact same stimuli This was a bigger challenge to introspectionist school of psychology

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.