Which research technique is least likely to be used to study the human brain

A)  electrical brain stimulation 
B)  transcranial magnetic stimulation 
C)  lesioning 
D)  positron emission tomography

Lesioning

A neuroscientific technique involving the damage or removal of specific brain tissue to study its functions.

Electrical Brain Stimulation

A method involving direct electrical stimulation of the brain to treat certain conditions, such as Parkinson's disease, or to study brain function.

Transcranial Magnetic Stimulation

A noninvasive procedure that uses magnetic fields to stimulate nerve cells in the brain to improve symptoms of depression.