Which of the following changes would you expect to find after administering a vasodilator drug that caused a 50% decrease in afferent arteriolar resistance and nochange in arterial pressure?
选项：

A:Increased renal blood flow, increased GFR, and increased peritubular capillary hydrostatic pressure ;
B:Decreased renal blood flow, decreased GFR, and decreased peritubular capillary hydrostatic pressure ;
C:Decreased renal blood flow, decreased GFR, and increased peritubular capillary hydrostatic pressure;
D:Increased renal blood flow, increased GFR, and no change in peritubular capillary hydrostatic pressure;
E: Increased renal blood flow, increased GFR, and decreased peritubular capillary hydrostatic pressure