IMO C
he argument suggests that taxing polluting commercial establishments based on the volume of air pollution or greenhouse emissions will encourage these businesses to reduce their emissions, thereby helping protect the city's air quality. To determine the underlying assumption that supports this conclusion, let's examine each answer choice:
A. Businesses will reduce the amount of pollution they emit by reducing the number of products they build.
This choice specifies a method by which businesses might reduce pollution (reducing production), but the argument does not depend on this specific method being used. Businesses could also adopt cleaner technologies or improve efficiencies to reduce emissions. Thus, this is not a necessary assumption.
B. The tax will not significantly affect the commercial health of most businesses, even if their factories do not reduce the amount of pollution they emit.
This choice addresses the potential economic impact of the tax on businesses. While the economic impact is a consideration, the argument assumes that the tax itself will be effective in reducing pollution irrespective of its economic impact. The assumption that the tax will not cripple businesses economically is not directly required for the argument that the tax will lead to reduced emissions.
C. The tax will not induce businesses to dispose of their greenhouse gas pollution covertly.
This choice directly addresses the possibility of businesses finding alternative, perhaps unethical or illegal, ways to manage or misreport their emissions rather than actually reducing them. If businesses simply shift their pollution rather than reducing it, the tax would not achieve its intended effect of reducing emissions. Thus, the argument assumes that businesses will comply with the spirit of the law and not engage in such covert activities.
D. The quality of the air is an important issue for most of the city's residents.
While public concern might be relevant to the motivation for implementing a tax, it is not essential to the argument's logic that taxing emissions will lead to reduced emissions. The argument does not depend on public opinion but on the behavior of businesses in response to the tax.
E. Polluted air could be purified and cleaned of greenhouse gases through technology installed at company factories at the point of emission.
This choice suggests a method for reducing pollution, similar to A. However, the argument assumes that businesses will find a way to reduce emissions, which could include technology, but it does not depend specifically on the adoption of purification technology.
From these analyses, Option C is the assumption made in the conclusion. The effectiveness of the tax in reducing emissions assumes that businesses will not find covert ways to evade the environmental intent of the tax. If businesses were to dispose of their pollution covertly, the tax would not lead to the intended reduction in emissions, thus failing to protect the city’s air as predicted.