I know I am 3 years late but your answer is A and C Hope it helps whoever sees this lol
A mutation that happens only on one point of the gene
Answer:
B
Explanation:
In the feudal system Knights worked for Nobels, who worked for the King. So Knights were below them but still above Merchants and Peasants. Knights were often equals to vassals.
usually if you look it up they will give you essays on it. which might be more helpful