The decoding gates for asynchronous counters may have "glitches" on their outputs because:
A) the flip-flops all change states at the same time.
B) the flip-flops change states one at a time; therefore no change for producing a glitch will ever exist.
C) the flip-flops all change states at the same time but tpd may vary slightly for each FF thereby producing glitches.
D) the flip-flops change states one at a time and erroneous counts may occur prior to the time all FF outputs have stabilized.
D
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