Born in 1822, Louis Pasteur was a French scientist. He invented a process, now called pasteurization, for preventing d drinking raw milk. One of Pasteur's key discoveries was the role that bacteria play in contaminating milk and other beverages
knowledge to the development of a method for removing bacteria from milk. During the process, milk is heated to a high tem
time, killing harmful bacteria. Starting in the 1920s, milk was routinely pasteurized in the United States. The practice became
The use of Pasteur's process has prevented countless people from becoming III.
Which sentence best helps readers understand the revolutionary impact of pasteurization?
1. "He invented a process, now called pasteurizing, for preventing diseases caused by drinking raw milk."
2. "One of Pasteur's key discoveries was the role that bacteria play in contaminating milk and other beverages."
3. "Starting in the 1920s, milk was routinely pasteurized in the United States."
4. "The use of Pasteur's process has prevented countless people from becoming ill."