Your answer us going to be A
I would say C.nervous system because that pretty much defines all of the answer choices.
The right option is; C. rod
Bacteria are unicellular, prokaryotic (cells with no true nucleus) microorganisms. Bacteria have various shape, size and structure. The three major shapes are; the sphere (coccus), the rod (bacillus) and the spiral (vibrio). The rod is the most common bacterial shape. Examples of rod shaped bacteria include; Bacillus cereus, Corynebacterium diphtheria and Coxiella burnetii.
Hertz measures the unit of Frequency
