题目选项分析

Amtown's public schools are supported primarily by town property taxes. The town plans to eliminate the property tax and support schools with a new four-percent sales tax on all retail items sold in town. Four percent of current retail sales is substantially less than the amount currently collected through property taxes, but town planners believe that adopting this plan will not have a negative impact on the funds available for the town's public schools because

[/blank]. Which of the following most logically completes the argument?

【选项】the sales tax in neighboring towns is much higher than four percent