Extra exam question E7D04

WhyA three-terminal voltage regulator is a series regulator. A three-terminal voltage regulator (input, output, and ground/common pins) is a series regulator, controlling the current flowing in series between its input and output to maintain the desired output voltage, answer B. It isn't described as a current source of either the series or shunt variety, and it isn't a shunt regulator, those work by a different mechanism, diverting current around the load rather than controlling it in series.