Display advertisements use imagery for visually appealing the viewers. They use pictures and fonts to gain attention. They may be black and white, or coloured. Option D: An amusement park is based on entertaining people, so it must look interesting. One would not be interested in going to an amusement park by simply reading a text ad. Moreover, discounts on rides can be displayed by using pictures of people on rides, enjoying in them.
Hence this would be best advertised as a display ad and option D is correct.
Option A: A vacancy for a content expert is a job listing and does not have any images to gain attention. Such ads use promising words and money figures instead. Hence it will not be advertised through display.
Option B: A local automobile repair shop would be listed in the classifieds section, as a text ad. They would not spend more on a display ad, unless it's a service center owned by one of the car companies.
Option C: Sale of cars do not require display ads. People selling them need the money and would hence spend little on the ad. Hence visual representation isn't necessary.
Hence options B, C and D are wrong.