The correct answer is B) The SART's blips on the PPI will become arcs and eventually become concentric circles. This is the correct answer because when a Search and Rescue Radar Transponder (SART) is transmitting, its signal will appear on a radar display (PPI) as a series of blips that gradually change into arcs and then concentric circles. This is the characteristic response of a SART, as it is designed to create this unique radar signature to alert rescue personnel to its presence in the immediate vicinity. The other answer choices are incorrect because: A) The DSC unit would not directly react to the SART signal, C) The SART signal appears as a steady target, not one that comes and goes, and D) The SART can provide a more precise location than a 2 nautical mile radius.