Which of the Following Is NOT an Explanation for the Centuries

Multiple Choice

Which of the following is NOT an explanation for the centuries it took between Leeuwenhoek observing microorganisms with his microscope and the discovery that microbes are capable of causing disease?

A) Microbes are found everywhere.
B) Bacteria appeared similar to sperm and blood cells under the microscope.
C) Microorganisms are capable of existing through spontaneous generation.
D) Diseases were not a problem in the world until long after the discovery of microorganisms.