A. All of the examples use sans serif, while example 3 also uses serif for some of the words.

B. The difference in weights in these examples is used to emphasized certain important text from the rest. Example 2 does this the most, while remaining clear to readers.

C. The typefaces seem appropriate in all examples, especially in example 3 since it uses an old style serif for the title and it fits with the time period of the play shown in the image.

D. The colors in all posters contrast well and keep the text visible throughout. The combination of bright and dark colors for text and background allow for great visibility of the text.