The government started to regulate this part of industry
The answer is: C. were superior at learning mazes.
From the result of this experiment, we can learn the different possibilities of learning methodologies that are applicable by mammals.
When combining the cages with colorful patterns, platforms, and ladders, the rat subjects in the experiments are trained to utilized different part of their brains when they try to solve a certain problems. The study suggested that this is the reason why rats in enriched cage were superior at learning mazes.
Hi
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░░░▌░▄▄▄▐▌▀▀░░ This is Bob
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Actually the studying the Egyptian civilization is mandatory if you wish to study the ancient history and its civilizations. The Egyptian civilization is considered as one of the very first that was built on the principle of unity as a whole state or entity, and it kept on spreading that at times, it reached from the Levantine to the North-West of Africa. The Mesopotamian civilizations, the Helenstic civilization, the Babylonian civilization and the Phoenician civilization were affected by the Egyptian civilization in one way or another.
Besides, The study of the Egyptian civilization is an interesting topic since it reached a level of development that was hard to reach at that age (the pyramids for example). Many sciences thrived and were practised in ancient Egypt. There's even some secrets that have been uncovered so far, despite all the technological advance we have reached, such as the secret chemicals that were used in the mummification and preserving the dead.