Which of the following describes bacteria?
A. single-celled eukaryotes that are usually found in
contaminated water or insect bites
B. living, single celled organism that are the most
common pathogen and can be treated with antibiotics
C. multicellular organism that usually is found on the
surface of skin and warm, moist, and dark places
D. non-living pathogen that can't be treated with
antibiotics and reproduces with a host