Advertising theme sentence, namely advertising slogan, is a short slogan sentence that has been used repeatedly for a long time in advertising works in order to strengthen the impression of the object of appeal on the enterprise, product or service. In the series of advertisements, the titles are mostly different, but the advertising slogans are the same, especially the advertising slogans that embody brand positioning and value proposition, which have been used repeatedly for a long time. Nike's "Justdoit!" It is an advertising slogan that embodies the personality and value of Nike brand. This slogan is used uniformly in a series of advertisements, so the correct answer is D.