Correct answer: D). Contradicted the accepted belief in spontaneous generation
Rudolf Virchow's and Louis Pasteur's contradicted the theory of spontaneous generation, which state that living organism originates from non-living matter.
According to this theory, it was believed that dust creates fleas, maggot arises from the rotten meat, wheat and bread left in the dark corner produces mice.
Louis Pasteur was the first scientist to prove that cells originate from the pre-existing cells.
Rudolf Virchow proposed that Omnis cellula e cellula, which means each cell comes from another cell.