"What the Flu Does to your Body, And why it makes you feel so awful" the passage is on commonlit.org*will give BRAINLIEST*
please help I have to get a good grade on this.
3. What is the author's main purpose in the text?
A. to encourage people to get vaccinated for the influenza virus to avoid the symptoms
B. to show how the immune system actually does more damage than the virus itself
C. to explain to people that the worse they feel during the flu, the faster they're healing
D. to explain why people feel so horrible when they're infected with the influenza virus.
4.How does paragraph 9 contribute to the development of ideas in the text?
A. It shows how the immune systems responsible for symptoms beyond the parts of the body directly affected by the virus.
B. It provides readers with all the symptoms that they will likely experience during the flu, improving their ability to recognize it.
C. It emphasizes how the influenza virus is capable of spreading to more important areas of the body through the blood stream.
D.It shows how the immune system goes overboard when its fighting an infection, spreading to areas of the body that are healthy.​