B. Segregation.
I have the same question and answered it and this is what it told me. I think it should be right.
Protein synthesis begins with genes
What this student thought was happening is called spontaneous generation. Spontaneous generation is a body of thought on the ordinary formation of living organisms without descent from similar organisms
HOWEVER, the student was wrong because it is impossible for organisms to be spawned out of nothing. The organisms appeared due to bacteria on the meat and in the air.
The one with the the limestone thingy is faster because the friction is loss
my educational guess
