Answer: The correct answer is a) true: the original thesis statement may need to be modified if the available information does not support it.
Step-by-step explanation: The thesis statement of an essay expresses the central idea that will be developed thoughout the essay. In other words, a thesis statement tells the reader what the essay will be about in one or two sentences that are found in the introduction. In that way, the information presented in the body paragraphs must be closely related to the thesis statement in order for the essay to be coherent. If the available information does not support it, the thesis statement needs to be modified making sure it reflects the real message of the text.