From an overall perspective, A would be the best answer. Since the Nile River has always been one of the biggest rivers in history, it would most likely sustain life for the people. As well as the mediterranean, people for thousands of years relied on the Mediterranean Sea for their food and even their transportation.
the answer is C because through common sense it makes sense.
The distance between the east coast and west coast of Australia is 2,500 mi.
Australia is an island country that is also a continent on its own, and that makes it unique. It is one of the biggest countries in the world, and no wonder that it is a very long and wide country.
In a straight line, Australia's east coast is 2,500 mi away from the west coast of the country.
The biggest and most influential city in the east coast is Brisbane, while on the west coast it is Perth that has that role.
The correct answer is - A) environmental changes decreased the production of food.
During its existence, Rome, did not faced any major challenges from environmental aspect that would reduce the food supplies to a point where it will make a big problem in the country. In times when there were some minor food problems, Rome was just using the food produced in the territories it had under its control, so it was never a major problem during its existence.