Which describes an overall effect of Louis Pasteur's discoveries?

Cities found proper ways to get rid of garbage and waste.

Weakened and dead germs could be used to create vaccines.

Scientists realized that there were still incurable diseases.

A heating process could eliminate germs found in milk.

Answer choice A,

Cities found proper ways to get rid of garbage and waste.

A heating process could eliminate germs found in milk.

Explanation:

One of the effects of Louis Pasteur's discoveries was the development of the process known as pasteurization. This is a process in which food is treated with mild heat to eliminate pathogens and increase its shelf life. Pasteur was able to develop this process in the 1880s when he conducted experiments in wine. Pasteurization is particularly important nowadays in the dairy industry.