Researchers Examining Brain Abnormalities Using FMRIs Can Conclude All of the Following

Researchers examining brain abnormalities using fMRIs can conclude all of the following EXCEPT

A) what the test subject was thinking at the time of the test.
B) which parts of the brain are activated while performing a specific task.
C) the similarities and differences between brain functioning in healthy and abnormal patients.
D) that it is difficult to understand the brain areas involved in the processing of information.