Because we process so much information every day, our brains have become in order to economize our mental effort.

Our brains have become "cognitive misers" in order to economize our mental effort.

Similar to as a miser person tries to abstain from giving out cash, the human brain frequently looks to abstain from spending computational exertion. In psychology, the human brain is thought to be a cognitive miser because of the inclination of individuals to think and take care of issues in easier and less effortful courses instead of in more complex and more effortful routes, regardless of intelligence.  

the density would be a smaller number.

the answer is: c. c.it limited the president’s power to start wars.

the war powers resolution of 1973 requires the president to notify the congress whenever the president wanted to order a military operation to other countries within 48 hours. if after being reviewed the congress disagree with the proposal, that the president will be banned from ordering the operation.