Lukas takes part in an experiment. He is subject to electrical brain stimulation. He reports to the researcher conducting the experiment that he hears clicks during the stimulation. The part of the brain that causes him to hear the sounds is known as the:

auditory cortex

Explanation:

Sensory information passes both the auditory and the limbic systems by the means of medial geniculate nucleus (MGN), a small oval mass that protrudes slightly from the underside of the thalamus, a big double-lobed structure buried under the cerebral cortex. Before the signal can travel on, however, it passes through another nearby structure called the thalamic reticular nucleus (TRN), which evaluates whether or not it should be passed on.

i think that c)gold was found there

but i am not sure