When you impose such policies, you declare how much of a certain currency can enter your country, or can leave your country. If you have different currencies this could harm your economy because it might prevent others from trading with you due to currency differences. If you do things like Europeans, then you can introduce a new policy that abolishes your old currency and adopts a widely used one like the Euro. This might boost your economy because others might invest.
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To keep up with the demands of industrialization
The Roman Tetrarchy. Tetrarchy refers to the establishment by the Roman Emperor Diocletian of a 4-part division of the empire. Diocletian understood that the huge Roman Empire could be (and often was) taken over by any general who chose to assassinate the emperor.
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The Constance of urban life since the early 1900s has been a relocation of suburbs. Option B is correct.
The increasing population in urban areas pushed many people, specially the wealthy ones to the suburs were they could stay in a most tranquil place far way from the noisy and crowded big cities. So, it became a costum to be commuting to the town.
In 1950 60% on people lived in the central city and 40% livied in the suburbs. By 1980 the percentages reversed with 40% living in the central city and 60% living in the suburbs.