Discussion
Why can a stage's signal swing exceed what the direct load line suggests?
Answer: B
Because the signal sees a smaller effective resistance, its load line pivots about the quiescent point with a steeper slope and reaches further in current for the same voltage change. The supply does not rise, the bypass capacitor maintains the emitter rather than adding drive, and saturation voltage changes are trivial. That two different load lines apply to the same stage under different conditions is easy to miss and changes the swing calculation.
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