In my marketing class, we all have to pick a marketing problem and do research. We have to follow the format on how to conduct the research also. What would be a good topic for me to choose? My topics of interest is finances, future career(s), and sports.

You can do something along the lines of "how do tobacco companies attract new users even though they have a negative consequence?" Also, look at how tobacco companies sponsor the ads that say that tobacco is bad.