The correct answer is A) During the late 1800s, unions worked to prevent business owners from exploiting workers.
The best thesis statement for an essay on the rise of unions in the United States is "During the late 1800s, unions worked to prevent business owners from exploiting workers."
When writing a thesis statement for an essay, the author must consider the following recommendations. The thesis statement must include the main topic; a central idea. The arguments you developed throughout your document should support the main point of the thesis. It should be short and powerful. Use one or two sentences. That is why the best option for this question is "During the late 1800s, unions worked to prevent business owners from exploiting workers."