It is the <span>presidential system, I believe. </span>
I believe the answer is D<span>. they increase the activity of brain regions responsible for planned behavior.
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stimulants produce more activity in parts of the brain such as the basal ganglia, frontal lobe, and thoughtful thought. This increase the likelihood for a person focusing all of his/her brain activity to one single goals and become more productive throughout the day,
The answer is B. Colonialism
Answer: New machines make running a factory more profitable
Explanation: