Answer:
C) symbols can represent a larger idea that the author is attempting to relay
Explanation:
In Literature, symbols (symbolism) are used to give a literary work deeper (more) meaning and to convey a larger idea to the audience.
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.
Basically, an author expresses his or her feelings, point of view (perspective) or views through the use of words and symbols 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 use of symbols for 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.
Hence, the way in which symbols support the purpose of an author is that, symbols can represent a larger idea that the author is attempting to relay.
This ultimately implies that, symbols helps an author to express (convey) large-complex ideas or abstractions that are not explicitly stated in a literary work.