The answer is A . You can infer(predict) an event based on evidence or foreshadowing
Speech balloons, also known as speech bubbles, dialogue balloons or word balloons, are a graphic convention used most commonly in comic books, comics and cartoons to allow words to be understood as representing the speech or thoughts of a given character in the story or events of the graphic novel or Comic.
According to the information presented before I would conclude that the main purpose of a speech bubble in a graphic novel is:
D) It illustrates internal thoughts.
No me ha dado la cara para que no pueda ver el médico que ha dado la cara de la cara a las puertas del teléfono de la vuelta a las dos a las que ha sido