对下面的个人所得税程序中满足语句覆盖测试用例的是（ ）if (income < 800) taxrate = 0;if(income <= 1500) taxrate = 0.05;if(income < 2000) taxrate = 0.08;taxrate = 0.1;
A. income = (800,1500,2000,2001)
B. income = (800,801,1999,2000)
C. income = (799,1499,2000,2001)
D. income = (799,1500,1999,2000)
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