Discussion
A stage's collector sits at the supply voltage. What is the operating point?
Answer: B
No drop across the collector resistor means no collector current, so the device is cut off - an open base circuit, a missing divider resistor, or no bias at all. Saturation would put the collector near the emitter, and mid-line would put it near half supply. Reading the collector voltage alone distinguishes all three states, which makes it the first measurement to take on any suspect stage.
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