Answer: A vassal was given the rights to control the fief and to have ownership of it. A knight may serve a serf in exchange for horses.
The two statements chosen above are not true. The vassal does not have the right to control or even own a fief and the knight also cannot serve a serf in exchange for horses or anything.
The authors claim in the passage is that sugar is different from honey. The authors primary purpose in the passage is that sugar is not as good as honey. The author uses interesting diction to get his point across about what he thinks of sugar and honey when in comparison.