Answer:
A. the author's opinion.
Step-by-step explanation:
An author's opinion can be defined as the ideas, perception or viewpoint representing and describing what an author think or feel about a topic, subject, issue etc.
If you read a text and determined it was meant to inform, what you understood from the text is simply the author's opinion. An author expresses his or her feelings, point of view or views through the use of words in order to convey his ideas to his or her target audience as an informative text. Thus, an audience is informed through an author's opinion about a particular topic, subject or issues. Since these informations are an expression of an author's opinion, they may not be factual and as such are subject to verification and tests.