I think it is C as plants take in Co2 and release oxygen which humans use to breathe.
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Muscle cells brain cells blood cells white blood cells fat cells
<span>Vitamin K clots the blood and stops excessive bleeding. There is a blood disorder called vitamin K deficiency bleeding (VKDB). It is thought that newborns do not get enough vitamin K from their mothers so this injection could prevent VKDB from developing.</span>
The taxonomic category between kingdom and class is Phylum.