I believe it’s the study of agriculture (c)
<span>Any type of pharmaceutical product or dietary supplement must be tested in clinical trials before they can be marketed in order to assess their safety for the general public's consumption and to confirm their intended purpose. While not a complete fail safe, these tests intend to prove a reasonable sense of safety for the product.</span>
Im going to go with C only because most dont make sense.
The answer to this is C because humans don't have cell walls and if you are looking at an onion it has a cell wall because it is a plant.
