I believe the best answer from the choices listed above is the third option. The Theory of spontaneous generation was A theory that wasdisproved by Redi and Pasteur. Hope this answers the question. Have a nice day. Feel free to ask more questions.
I think it is 2048 molecules
What were the people drinking?
A controlled variable is not changed throughout an experiment. It is there so that the other variables being tested on can be better understood.