Final answer:
The interactions between Byzantine Empire and Western Europe in this era were somewhat friendly, marked by diplomatic alliances but occasional conflicts. Option b.
Step-by-step explanation:
The interactions between the Byzantine Empire and Western Europe in this era were option B) somewhat friendly, marked by diplomatic alliances but occasional conflicts. While there were periods of peaceful relations and economic cooperation through trade, there were also instances of tension and conflict due to religious and political differences.
For example, the Byzantine Empire had extensive trade links with Western Europe, particularly through Constantinople as a major terminus point of the Silk Road. This facilitated cultural exchanges and economic cooperation.
However, there were also religious tensions between the Eastern Orthodox Church in Byzantium and the Catholic Church in Western Europe, which sometimes led to conflicts such as the Fourth Crusade's sacking of Constantinople in 1204.
Overall, while there were friendly interactions and trade between the Byzantine Empire and Western Europe, there were also occasional conflicts and tensions that characterized their relationship in this era.
So Option b is correct answer.