Select the True Statement Regarding Analog and Digital Signals

Multiple Choice

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.