Louis Pasteur Made Several Important Contributions to Microbiology

Louis Pasteur made several important contributions to microbiology. These included studying wine making,diseases in silkworms and which of the following:

A) associated diseases with multiple different organisms, such as the 3 different organisms which caused the same silkworm disease
B) developing the first rabies vaccine
C) used swan-necked flasks to prove that air contained the vital force that brought microbes
D) discovering a method to introduce unwanted organisms into food and wine