This type of voting is called single party voting or univote.
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The newspaper design element which has changed drastically from 1900 to today is option C that is the advertisements moved from the last page to front page.
<h3>What is a newspaper?</h3>
A newspaper is a source to gather news of all over the world every day. It is a printed paper containing news, articles, advertisements, and correspondence.
In early 1900, newspaper does not consist much advertisement but till the time passed, now it is changed a lot. From having advertisements at the last page than to middle and then now at the front page it changed so excessively.
Learn more about newspaper here.
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I believe the answer is: A.Smith knew that the invisible hand of the market was not concerned with the health of the laborer.
The power of invisible hand in the market only care about the power of supply and demand which would determine who will obtain the most wealth. Even if the process could disregard the wellness of many people, as long as the demand is met, consumers wouldn't put too much thought on the laborers.