Final answer:
Differences between eastern and western European worship included language, music, and rituals, with the entire spectrum of these differences encapsulated by option 'd. All of the above'.
Step-by-step explanation:
The practices during worship that were different between the eastern and western sides of Europe include:
- Language used: In the west, Latin was the language of the church, while the Greek-speaking Byzantine Empire accepted local languages for religious use.
- Use of music: Different traditions in liturgical music evolved, with the Western Church developing Latin liturgical rites like the Roman Rite, while the East had varied traditions such as Byzantine Chant.
- Rituals performed: There were differences in various rites, such as the form of the liturgy, the use of icons, and other religious practices.
In summary, d. All of the above were practices during worship that differed between the eastern and western sides of Europe.