Answer: C. World War II
Explanation: World War II saw major advances in medical technology including the mass production of penicillin. On March 14, 1942, U.S. made-penicillin was used to successfully treat the first patient for septicemia, or blood poisoning. While that one treatment exhausted half of the available supply of penicillin in the entire U.S., the need for better techniques for rapidly producing penicillin on a large scale was necessary to treat soldiers fighting abroad. Scientists working around the clock manufactured 2.3 million doses of penicillin in preparation for the D-Day landings on June 6, 1944.
