B. Thesis
A thesis statement is a sentence that explains what you are trying to prove and provides an overview of the arguments you will make in your body paragraphs. The thesis acts as a roadmap for the rest of your paper. Do not worry about going into too much detail about what your arguments will be; instead, focus on writing a clear, concise statement that hints at the topics you plan to discuss.
Example
The legal driving age should be changed to 20 because teen drivers are more likely to cause accidents and they are not mature enough to understand the repercussions of their actions.