The answer is A) a regressive tax. A regressive tax is a tax that takes a higher percentage of income from low-income earners than from high-income earners. In this case, regardless of a person's income level, everyone pays the same 10% sales tax when purchasing the TV. This means that low-income earners would have to spend a larger proportion of their income on the tax than high-income earners, making it a regressive tax.