Scientists place great confidence in cell theory, yet it has not been evaluated using every living thing on the planet. What piece of evidence would most likely cause scientists to decide that cell theory would need to be revised?

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

a and c are the answeres

idk

explanation: