What you are describing is called a monopoly.
A monopoly is when one company or entity controls an entire share of a market. For example, if Apple became the only company you could buy a cell phone from, this would make Apple a monopoly. Monopolies can hurt the American economy, as a business with no competition can essentially charge whatever they want for a good or service since there will be no business who will offer a better prices.
The correct answer is: "To force a certain country to change an undesired behaviour"
Economic and trade sanctions are common mechanisms in international affairs. They are imposed by a country or group of countries and they set a penalty on imported products from one or more other nations.
Sanctions aim to force the punished nations to change their behaviour or policies on a certain issue, by limiting their ability to trade with the nation(s) that has(have) imposed the sanction and, in turn, they negatively influence their economic growth opportunities. For example, the US imposes a sanction aiming to force a country to respect human rights by abolishing child labor.
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Ronald Reagans experience as an actor help him sharpen his public speaking skills which advance his career as a politician by increasing his popularity. As an actor, he was also familiar with the screen and was able to endear himself to Americans
