The answer is in fact The Jefferson: It’s sleek, speedy, and sensational! By limiting the audience to young single people it is important to use adjectives that will resonate and appeal on that specific audience. The first option uses the adjective trustworthy and old which will imply that the audience is looking for a car that they can relay on and are comparing it to an old dog, which will connote a family dog. This type of adjective and connotation does not appeal to someone who is not in a relationship and who is old enough to drive but is not a full adult yet. The third option uses the adjective safest this type of description will appeal to the guardians of the young person rather tan the young itself. The last option isn't correct either as the adjective used is roomiest this implies it has space for lots of people, which by limiting the audience to single people will not work. Single people will most probably drive by themselves. Therefore, the only viable option will be the second one, where the adjectives are short, express that the car looks great on the outside and that it can go as fast as you want it to, all adjectives that appeal to the specific audience.