Feudalism helped protect communities from the violence and warfare that broke out after the fall of Rome and the collapse of strong central government in Western Europe. Feudalism secured Western Europe's society and kept out powerful invaders. Feudalism helped restore trade. Lords repaired bridges and roads.
I think the correct answer is B. Using general subjects and masculine and feminine pronouns are ways to avoid gender biased language. General subjects can pertain to a male and female. Also, including both masculine and feminine pronouns in a statement will aid gender equality.
There are some ADVANTAGE of legalizing baby bins or baby hatches which are typically used to leave the newborn babies by their parent who do not want them for certain reasons and abandon them there.
This can save many lives of the newborns as the other way people might choose is killing the babies or abandoning them at places where no one might ever find them.
The baby left there will have a positive opportunity to flourish in the society unlike the one left at street as the hatches are monitored by law.
There can be some DISADVANTAGES as well to the scheme as it might help promote immoral behaviors in society. A key factor in stopping immoral activities is the fear of society, and baby bins remove that fear. Another risk can be of an increasing tendency of rapes where people might think its OK to give birth to children and then leave them to baby bins.
I would say that you would only use them when you are writing in the thousands or more other than that u don't use them