A similarity between the separation of powers, the system of checks and balances, and federalism is that they all are meant to keep the federal government from becoming too powerful and tyrannical.
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The president could become a stronger bargainer with congress by increasing his popularity with the people. This is because the members of congress represent citizens and if citizens aren't happy then they're going to complain to their congressman and congresswomen. If they don't act on what their constituents want then they'll eventually be voted out of office for someone who will.
Answer: B is correct.
Explanation: Thomas Aquinus was a disciple of Albertus Magnus who was great thinker because he was able to think outside the box (he is usually associated with the introduction of Aristotelian medieval thinking in medieval, philosophically Platonic, thinking which dominated European theology and philosophy at that time). So Thomas is usually considered one of the most important representatives of Aristotelian philosophy (Aristotelian philosophy was interested in nature, in material world and experiment). Thomas was able to see that thinking of his time is two one-sided (Platonic).