Who or what was considered the most powerful influence during the Middle
Ages?
A. the church
B. kings
C. monarchs

A - The church

Explanation:

The church had authority over government as well, so it was the most influential during the Middle Ages.

what class is this for i can then

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering