What sort of argument would claim that a link exists between smoking and cancer?

What sort of argument would claim that a link exists between smoking and cancer? What would make this a stronger argument? What would weaken it?

What type of argument could this become once other claims are added to it? How would this latter type of argument be assessed?

Would either type of argument prove definitely that one should not smoke? Why or why not?

Write a four-page essay that answers these questions. Be clear to differentiate between the first given argument and the other arguments that you would construct. While a thesis for this essay is not imperative, the essay should include an introduction and conclusion