77. Select the response that best describes the use of the Master Reset on typical 4-bit binary counters.
(a) When MR1 and MR2 are both HIGH, all Qs will be reset to zero.
(b) When MR1 and MR2 are both HIGH, all Qs will be reset to one.
(c) MR1 and MR2 are provided to synchronously reset all four flip-flops.
(d) To enable the count mode, MR1 and MR2 must be held LOW.
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