Symbolism in Anna Karenina

This is a research paper for my literature class. The book is Anna Karenina. My topic is symbolism-you have to pick one symbol. I want the paper to discuss the most significant symbol in the novel-the railroads. I will attach an outline I hastily wrote, you don’t have to follow it exactly but they include many of the main ideas I want in the paper. You must consider many possible meanings of the symbol and its connection to the plot. Please make this paper A+ material- I am usually an A+ student but I do not have time to write this paper. That means very detailed in relation to the book with a thorough analysis and and I need at least 5 sources. I also don’t want the paper to be too different from my normal writing style. I do not know exactly how to describe my writing style but it is more like a history paper style writing.