What is wrong, if anything, with the circuit in the given figure based on the logic analyzer display accompanying the circuit?

mcq6_1017_1

[A].	The CO terminal is shorted to ground.
[B].	The S1 output is shorted to Vcc.
[C].	The P1 input is not being added into the total.
[D].	Nothing is wrong; the circuit is functioning correctly.

Answer: Option C

Explanation:

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