In a study by hedden and his colleagues (2008) examining brain activity, east asians and european americans underwent an fmri while focusing on either a target or the context of a picture. when asked to focus on the context of a picture, european americans' region(s) of the brain were more active.

Frontal and parietal

Explanation:

In several studies carried out by the society of neuroscience of the United States, it was discovered that distributed stimulus to the visual cortex are controlled by a link and subsequent activity in the frontal and parietal cortex of the brain. And each time a task which requires visual interpretation is at hand a section of the brain dedicated to attention-to-working-memory is cued before being presented to other areas of the brain, and this section is the frontal and parietal lobe.

The Society of neuroscience managed to identify frontal and parietal areas exerting top-down control over, or reading information out from, distributed patterns gathered by our eyes. But they also concluded that many different areas participate in the context understanding of said information, just that the two most active, including escenarios with distraction, were the frontal and parietal lobes, meaning, the area of the brain controlling our reactions and the area dedicated to interpret outside stimuli.

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i think your answer is c. measurement system in which the medication dosage was calculated.