Name two areas of Europe that became Christian between 476 and 1050

Britain, Germany Russia

Explanation:

After the fall of Rome in the middle ages, Christianity split into two groups the western and the Eastern Church. The Roman Catholic Church's missionaries spread Christianity in western parts of Europe in the middle ages. In the Eastern part of Europe, the Byzantine Empire came into power, spread Christianity and built Church Hagia Sophia.

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answer: the third option is your answer

explanation:

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering