Text D, the advertisement "Strom hilft ordnen," is much more concrete than the flier, and hence it is probably more readable. Its intended reader is the person in the street, not the politician, and so uses "simple" concrete facts to make its point. True, its vocabulary seems simple as well, but that is not strictly true: the ad builds from concrete premises in simple language ("wir brauchen immer Strom") to much more abstract ones ("im Jahresdurchschnitt") and idiomatic expressions ("ein geordnetes Leben").  In contrast to Text C, then, this text begins by placing the reading in a very concrete situation (the who, where, what, and when of the text are clear: "the city-dweller who uses subways or cars, on the street [with stoplights], who needs electricity, always"), and then moving to more abstract concepts ("umweltfreundliche[r] Fortschritt").
    If you chose this text, you were probably responding to its clear layout and pictorial content, as well. Good illustrations, charts, and graphs (which clearly help the reader identify topic or lexical choice), or a good layout on the page (e.g., "pro" and "con" of an issue laid out in parallel text) help situate the world of the text for the average reader.

     Texts that talk about concrete situations or that are framed concretely (with a distinct who, what, where, and when  are generally easier to understand than texts that refer to abstract topics or which frame their issues in an unspecified time and place with unspecified actors; that is, in terms of philosophical, emotional, opinion, ethical, or other theoretical debates -- without specifying whose issue, where, and when these debates occur).  Concrete references to context make understanding a text (reading it) easier.


 TEXT PAIR 2, EXERCISE 1
 TEXT PAIR 3, EXERCISE 1