i dont know bu you can look it up on the intermnet
it isn't letting me submit my answer so i will comment on this answer.
because she doesn't think of Paris fondly and doesn't want to marry him. She wants to tell her mother this but doesn't want to disappoint her. She tells her mother that she will keep an open mind about Paris while at the party.
A thesis statement you just have to state purpose for what you are writing so I guess they can help but I wouldn't rely on them you'd focus that more on the body paragraphs then the thesis