What is the primary goal of pulse code modulation (PCM)?

A) To encode analog signals into digital format

B) To transmit signals over long distances

C) To increase the frequency of a signal

D) To filter out noise

Answer: A) To encode analog signals into digital format

Explanation: Pulse Code Modulation (PCM) is a method used to digitally represent analog signals by sampling the signal and quantizing the amplitude levels, making it suitable for digital transmission and processing.