A decrease in afferent arteriolar resistance in the renal glomerulus would have which of the following effects on glomerular filtration rate (GFR)?

✓ Correct Answer: Option B

A decrease in afferent arteriolar resistance allows more blood flow into the glomerulus, increasing glomerular hydrostatic pressure. This elevated pressure drives more fluid out of the capillaries, thereby increasing the glomerular filtration rate (GFR).