What do you mean by this question?
B) Somatotopic is described as the point-for-point correspondence of an area of the body to a specific point on the central nervous system.
What is the main character of the story trying to accomplish or what is their main goal?
What is being said about the person, thing, or idea (the topic)?
What is the writer trying to say?
What is the most important point the author wants me to understand about the topic?
Is there a topic sentence?
When you enumerate you need to put comas between all the items except the ones which are connected by "and" : as A is not correct as it does not have comas, and B is incorrect as it has comas where "and" is.
now, in a way both C and D are correct, but C is the usual accepted version, and D is an example of "Oxford coma" (where the coma is optional, to remain on the safe side, choose C).
Answer:
it means treat others as you wish to be treated. that is the main rule of the Torah according to Shabbat. everything else just further states that one rule and adds onto it