Select the true statement regarding analog and digital signals.
A. Analog signals vary over time continually and can be represented by a sine wave, while digital signals are binary 1s and 0s using voltage levels.
B. Digital signals vary over time continually and can be represented by a sine wave, while analog signals are binary 1s and 0s using voltage levels
C. A modem is not required to use a line that uses analog signals.
D. On fiber optic media, a 1 bit can be represented as a pulsing analog signal.
Answer: A
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