(Not a teacher)
You seem to put 'the' in where it isn't needed. If you are talking about a noun in general - all advertisements, or all people - then you don't use the definate article.
Also, I changed businessman to businessperson, and added 'his/her'. This is more a personal thing than a correct thing. But I think writing has stopped being gender-specific as far as possible.
Student or Learner