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You want to test whether a given brain area is involved in a certain cognitive task. Which of these techniques and data would be most useful:a- EEG to get a map of the different brain areas that are active during the task compared to another task or a baseline taskb- fMRI to get to get a map of the different brain areas that are active during the task compared to another task or a baseline taskc- tDCS to stimulate the part of the brain and measure the corresponding brain activityd- CT scan to get a map of the brain area under investigation

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