Answer:
B. Brain activation is markedly less in subjects diagnosed with depression.
Step-by-step explanation:
It is likely that the researcher shown in the question above realizes, based on his experiment, that brain activation is significantly less in individuals diagnosed with depression. This is because depression has the ability to "age" the brain and, consequently, decrease the synaptic density, not allowing the nervous cells to pass impulses and transmit information to each other.
For this reason, in the research shown above, people diagnosed with depression will show less brain activity, that is, less sensitivity and reaction to the images viewed by them.