The main purpose of an expository text is to inform the reader about a topic (option A).
An expository text is a type of text that, as its name indicates, has the main purpose of presenting an overview of a particular topic.
Generally, expository texts offer the reader the possibility of acquiring a basic and general vision of a topic and leave him free to build his own point of view on it.
According to the above, the expository text has the purpose of informing the reader about a topic (option A).
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