The technique of transcranial magnetic stimulation (TMS) employs strong magnetic pulses at a particular site on the scalp. When this technique is applied to the scalp near Area V1, the effect is:

a. A temporary disruption of vision and visual imagery.
b. A temporary disruption of vision but not visual imagery.
c. To give the participant rich and detailed hallucinations.
d. A permanent disruption of visual imagery, and therefore use of the technique is unethical.