Multiple choice Directions: In which year given discovery/invention was made: Pasteurization 1769 1967 1866 1900 Reveal answer Fill a bubble to check yourself C Correct answer Explanation Louis Pasteur developed pasteurization, a process of heating liquids to kill harmful microorganisms, in the 1860s. He first tested it on wine and beer in 1864-1866, and it was later applied to milk processing.