Final Answer:
Common digital audio file types include a) MP4 (MPEG-4 Part 14,) b) WMA (Windows Media Audio), and c) WAV (Waveform Audio File Format).
Step-by-step explanation:
Digital audio files come in various formats, each with its own characteristics and uses.
WMA (Windows Media Audio) is a Microsoft-developed format known for its good compression and quality.
WAV (Waveform Audio File Format) is a standard file format for audio on Windows, characterized by its lossless compression, preserving high-quality audio.
MP4 (MPEG-4 Part 14) is a versatile multimedia container format that can store audio, video, and other data. However, MOV (QuickTime Movie) is primarily associated with video files rather than audio.
Option A, B and C are answers.