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 author's purpose is suggested by the text?
to inform readers about the discovery of the Epstein-Barr virus
to describe how it feels to have mononucleosis
to inform readers about an infectious disease called mononucleosis

The author's purpose suggested by the text is:

C. to inform readers about an infectious disease called mononucleosis.

Explanation:

Let's summarize the passage by dividing it into topics:

- there is a disease called mononucleosis;

- the virus that causes it is the Epstein-Barr;

- it spreads through saliva;

- the symptoms include fatigue, fever, sore throat, etc.;

- a blood test can confirm the disease;

- the symptoms last a few weeks.

As we can see, the passage gives us some general knowledge about the disease. It does not focus on how the virus was discovered at all. Even though it mentions the symptoms of mono, it is incorrect to say that the passage's purpose is to describe how it feels to have the disease. That is not its focus, it is just one of the many topics it discusses. Therefore, the best option is letter C:

C. to inform readers about an infectious disease called mononucleosis.

the development of trade during the middle age increased to the change given in the agriculture, which gave money, industry and markets a bigger importance in economy. the agriculture production was more than the consumption, which meant the creation of wider markets out of the areas. besides, with the end of multiple wars, the population increased and new trade routes were created.

to eliminate ambiguous remote or broad reference it is necessary to focus on anaphoric reference. by definition "anaphoric reference means that a word in a text refers back to other ideas in the text for its meaning." the references should be clear and leave no room for ambiguity.

in the first case the pronoun it probably refers to the car but it has not been mentioned before so we should replace it for the car. in doing so the statement becomes clear.

in sentence number   two   the pronoun he refers to charles dickens the author. yet, the first half of the sentence is about the book a tale of two cities. to repair this it would be better to rephrase the first half : after i read   a tale of two cities by dickens, he so as to remove the remote reference.