The body of an essay is the most informative and integral part of a composition. Please select from the following statements on the body of an essay the wrong one.
选项：

A:There are three fundamental elements of a body paragraph: a topic sentence, supporting sentences and a concluding sentence.;
B: The body part should be one-paragraph long as the introduction and conclusion part.;
C:After having chosen/analyzed a topic and written the thesis statement, it is best to begin writing the body because the introduction needs to reflect the body.;
D:---