Answer:
A) to state theme
Step-by-step explanation:
A theme is a moral message or a universal lesson (usually expressed in one single sentence) that a literary work expresses about a topic and that we can apply to our lives or other literary works. Very often, this message is not directly stated in the story so we, the readers, have to figure it out. Thus, the sentence "Americans need to be more aware of the crisis in Africa" is a theme because it is in the form of a message or a piece of advice that we can apply to our lives.