求解一道蓝皮书，标题要长才有人看

liufeng881025

Which of the following, if true, is the most logical completion of the argument below?
The tax system of the Grootland encourages borrowing by granting its taxpayers tax relief for interest paid on loans.The system also disencourages saving by taxing any interest earned on savings. Nevertheless, it is clear that Grootland's tax system does not consistently favor borrowing over saving, for it did, there would be no______________________________
答案如下
A .Tax relife in grootland for those portions of  a taxpayer's income, if any, that are set aside to increase that taxpayer's total savings.
A选项好难懂，而且不明白A怎么说明了上面那个问题了？

liufeng881025

上册271题~ 谢啦