A thesis/dissertation is an extensive piece of writing based on extended reading and independent research at undergraduate and postgraduate levels. It is like a more in-depth research paper in which a student researcher proposes research questions(or hypotheses)and answers these research questions (or proves/disproves the hypotheses)by conducting independent or even original research. The process of writing a thesis/dissertation is a great experience of developing academic writing skills, being socialized into one particular discipline and growing up intellectually. The organizational structure and the length limit of a thesis/dissertation are usually set by universities. Read this paragraph and determine which of the following is true?（ ）
A.
This paragraph is unified and well-developed.
B.
The topic sentence of this paragraph is the first sentence.
C.
The first sentence of the paragraph tells the readers the topic.
D.
The paragraph does not provide adequate supports.