<prompt> A 62 year old from Wales presently in US develops oliguria and peripheral edema over a period of weeks. Urinalysis reveals hematuria and proteinuria; examination of the urinary sediment reveals red cell casts. Renal biopsy shows many glomerular crescents. This presentation is mostsuggestive of which of the following conditions?Rapidly progressive glomerulonephritisDiabetic nephropathyHypeensive nephropathyLupus nephritis  <response>: Rapidly progressive giomeruloephritis 