Extra exam question E7B11

WhyIn Figure E7-1, R3 provides self bias. In Figure E7-1, R3, connected between the emitter and ground, is the self-bias (emitter bias) resistor: as collector current tends to rise with temperature or from transistor-to-transistor variation, the resulting increase in emitter current raises the voltage across R3, which reduces the base-emitter forward bias and pulls current back down, a built-in negative-feedback stabilizing action, answer D. It isn't fixed bias, isn't specifically an emitter bypass component (that's C3's job, bypassing R3 for AC signals), and isn't the output load resistor, that's a separate connection at the collector.