The correct answer is A) The people who lived at the manor all shared the same faith.
Aside from convenience for the lord and his family, the most likely reason a church was part of a manor was that the people who lived at the manor all shared the same faith.
Although peasants and servants had to work very hard during those days, the manor system in the Middle Ages helped the servants because it provided them with shelter for the families, meals, and protection. In exchange, servants pledge allegiance to the Lord and tenaciously worked for him. The church was a big part of society in those years. Religion was the kind of bond that made relationships easier and gave people reason to exist.