Final answer:
Music can be stored on an iPod in various formats such as MP3, WAV, Apple Lossless, M4A/AAC, protected AAC, AIFF, and MPEG, so the correct answer is d) All of the above.
Step-by-step explanation:
The format in which music can be stored on an iPod includes several different file types. These formats are a) MP3, WAV, Apple Lossless, b) M4A/AAC, protected AAC, AIFF, and c) MPEG. Therefore, the correct answer to the question is d) All of the above. These formats offer a range of audio quality and file sizes, allowing users to choose the best option to balance their needs for sound quality and storage capacity.