Renal autoregulation of GFR helps prevent large fluctuations in GFR despite wide variations in arterial blood pressure. With regard to autoregulation, which is TRUE?

• A. the macula densa cells sense change in afferent arteriolar pressure
• B. falling GFR results in a feedback to decrease efferent arteriolar pressure
• C. falling GFR results in an increase in renin secretion from macula densa cells
• D. decreased macula densa concentration of NaCl results in dilatation of afferent arterioles
• E. decreased GFR decreases NaCl reabsorption in the ascending loop of Henle