Answer:
C.) Describe complex topics in a straightforward way
Step-by-step explanation:
A is wrong because it just doesn't make any sense
B is wrong because it is against the point of an informative essay to discuss topics that do not relate to the point of the text
C is correct because the purpose of an informative text is to inform an audience of a topic that they otherwise know nothing about. This involves helping them understand the ideas that they are discussing
D is wrong because an emotional tone may show bias in a text and therefore decrease the author's credibility on the subject