Answer:
I, II, and III
Step-by-step explanation:
These can all be used to call attention from readers to important information, since people will generally not read blocks of text. Graphic features, such as putting relevant info on a box or a graph, will make people look at it first. Typographical features, such as using bold lettering or a larger font will have the same effect. Headers, numbers and/or bullets will call attention to very specific information that people will be looking for.