Sharon had been ill for five days. When her mother took her to the doctor, the doctor decided not to prescribe an Antibiotic; he said Sharon had a virus. Why did the doctor NOT prescribe an Antibiotic? a. Antibiotics target only White Blood Cells. b. Antibiotics are not used to fight any infections. c. Antibiotics cause fevers that make Viruses stronger. d. Antibiotics kill some Bacteria and Fungi and are unable to treat Viruses.

d. Antibiotics kill some Bacteria and Fungi and are unable to treat Viruses.

Explanation:

Antibiotics are only used to kill bacterias or to decrease their reproductive rate by difficulting their growth and reproduction.

Also, some antibiotics might be used o treat infections caused by some fungi and parasites (but not all of them).  

To remember this, you can just think about its name. Anti- means against, biotic- means life. These are substances used to attack certain living beings, such as bacteria. As viruses are not alive cells (they are DNI + proteins), antibiotics have no effect on them.