When asked to imagine playing tennis, a noncommunicative patient exhibited that was similar to that exhibited by a healthy person?

The Answer is "Brain activity".
A non-communicative patient exhibited brain activity that was similar to that exhibited by a healthy person.
This is an example to show that non communicative patients (the patients that do not talk or impart information) can also show the sign of consciousness, there are many forms of consciousness.

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.