In Pasteur's Experiment Showing That Living Organisms Arise from Other

In Pasteur's experiment showing that living organisms arise from other living organisms, which one of the following statements MOST accurately describes Pasteur's hypothesis?

A) Straight-neck flasks allow for more contamination than swan-neck flasks.
B) Sterilization of broth kills microbes.
C) If microbes arise from nonliving matter, they should appear spontaneously in sterile broth.
D) Microbes should be capable of growing equally well in sterile broth contained in both straight-neck and swan-neck flasks.
E) The first cells must have come from chemical reactions occurring in early Earth.