Final answer:
When a nation imposes many tariffs, the likely effect is that the nation will become more isolated from the world because protectionism typically leads to higher prices for imports and retaliatory measures that reduce international trade.
Step-by-step explanation:
When a nation imposes a lot of tariffs, it is engaging in protectionism, which usually leads to higher prices for imported goods and may encourage consumers to buy domestically-produced alternatives. However, this policy can also lead to countries becoming more isolated from international trade.
Over time, this may result in industries relying on government protection and potentially becoming less efficient, as they face less competition from abroad. Furthermore, imposing tariffs can lead to retaliatory measures from other countries, which could further reduce international trade.
Therefore, when a nation imposes many tariffs, answer c) the nation will become more and more isolated from the world is the most likely effect. This can be contrasted with other results such as the rapid increase in global trade, which is unlikely, as restrictions usually hamper trade flows. Additionally, the increase of foreign goods in the nation's market and becoming the number 1 economy in the world are also less likely to be direct outcomes of imposing a lot of tariffs.