Hello. You did not provide the answer options, which makes it impossible to answer your question, but I can help you by showing you what a thesis is and showing you an example.
A thesis is a statement that must be presented in the introduction of an essay. It has as main objective to determine the main theme of the lesson and the topics that will be covered during the reading, showing the author's position on the subject addressed.
An example of this, can be the phrase: "The execution of the civil war, was, in fact, revolutionary in relation to the time in which it was established, however the expenses and losses caused in the country surpassed any positive point that the war caused, in addition, reaffirmed the government's disregard for blacks, who were released without any public policy to shelter them. "
