'Nobody' is basically contracted in itself, I don't believe you can decrease the word further.
D. because it has no comma and theres multiple places where theres reasons for this is a run on sentence.
His plays were written in old English.
From the given topics, the research topic that is too broad is option A. The music industry has a long and colorful history and includes many types of companies and professionals who create, market, and sell music of all genres. This is very broad because the music industry composed of different fields. It may talk about the history, the professionals, how music were made and what makes it saleable, and also what are the different genres.