Question

review the text.
mononucleosis, or \mono\ for short, is an infectious disease usually caused by the epstein - barr virus. this virus is transmitted through saliva, so mono can be spread through kissing, coughing, sneezing, and sharing straws or utensils. symptoms may include fever, sore throat, fatigue, weakness, and swollen lymph nodes in the neck or underarms. a doctor may need to do a blood test to confirm a diagnosis of mono. symptoms usually go away on their own within a few weeks, but some patients continue to experience fatigue and weakness for several months.
which best shows that the authors purpose is to inform readers about an infectious disease called mononucleosis?
the author reassures readers that symptoms usually go away on their own within a few weeks.
the author alerts readers to the risk of sharing straws or utensils.
the author provides facts about the cause of mono, how the disease spreads, and what its symptoms are.

Explanation:

The author's purpose to inform is best shown by presenting factual information about the cause (Epstein - Barr virus), mode of spread (through saliva), and symptoms (fever, sore throat etc.) of mononucleosis. The other options focus on single aspects rather than a comprehensive set of facts.

Answer:

The author provides facts about the cause of mono, how the disease spreads, and what its symptoms are.