Based on the indications of probe A in the figure given below, what is wrong, if anything, with the circuit?

• The logic probe is unable to determine the state of the circuit at that point and is blinking to alert the technician to the problem.
• The output appears to be shorted to Vcc, but is being pulsed by the pulser.
• The output appears to be LOW, but is being pulsed by the pulser.
• Nothing appears to be wrong at that point.