Sorry if I am wrong ! I think the answer is A
The answer is: you can treat bacterial infections, not viruses with antibiotics.
The use of antibiotics in viral infections is not effective and many organizations recommend the use of antibiotics only when there is a documented bacterial infection. The treatment of viral infections has been difficult for they are tiny and replicate inside the cell.
A unicellular organism must perform all functions necessary for life. A multicellular organism has specialized cells, tissues, organs, and organ systems that perform specific functions.

<em>The next time you wake in the middle of the night and need to make a trip to the kitchen or the restroom, cover one of your eyes with your hand before turning on any lights. You'll save the night vision (a.k.a. Sharingan) in that eye. The effect is trippy.</em>