Refineries I think, it makes the most sense to me.
Answer with Explanation:
The <em>peak, trough, recession and recovery</em> are stages of the "Business Cycle." They can be represented in a line graph as points that represent individual stages. Each can tell what a country's economy is experiencing in terms of fluctuations happening in economic activities.
The peak is that highest point in the graph. It means that the economy is producing the maximum output that it is allowed to do so.
The trough is the lowest point in the graph. This marks the<em> end of depression.</em> This means that soon, the<em> economy will try to recover.</em>
The recession is that point on the graph that goes down following the peak. This is a period of economic decline or contraction. Here, the production decreases.
The recovery is that point on the graph that goes up following the trough. This stage is marked by increase in demand and production. It is considered to be the end of the business cycle.
They allow the researcher to generate many hypotheses.
The correct answer is C) countries benefit from increased voluntary exchange.
One of the major advantages of specialization is that countries benefit from increased voluntary exchange.
When we are talking about specialization in the industries of a country, we find some advantages. Among these advantages are:
Industries produce increased levels of goods to trade.
Workers specialized in the production process of one good and this made them more effective and productive.
These better levels of productivity make the industry to be more efficient with its costs
Industries offer more training for their workers to strengthen their specialization.
One of the benefits for workers of this specialization is that they can negotiate better wages