Louis Pasteur’s discoveries were important because they a.

were a step in preventing disease.

b.

led to the science called genetics.

c.

allowed safe surgery.

d.

led to the end of World War II.

a.  were a step in preventing disease.

Explanation:

Louis Pasteur was a famous microbiologist and a French chemist who worked on a process and the invented a process known as the pasteurization.

Pasteurization is a process where food item especially, milk, wine, etc. are are heat treated to kill the germs and other disease causing germs and it increases the quality and its shelf life.

He also studied many germs and pathogens that causes diseases and so he made many medicines and vaccines for these disease. Thus his work were a step in preventing diseases by killing the pathogens or diseases.

it should be d or b but i'm sure it's d

answer; pentagon papers, vietnam draft-resistor, james dean, american revolution;