YDS Paragraf tamamlama nasıl çözülür Test 1

8. The discovery of penicillin by Alexander Fleming in 1928 was a monumental accident that changed the course of medicine. He noticed that a mold contaminating his petri dishes was killing the bacteria he was studying. ________. This serendipitous observation laid the foundation for the development of antibiotics, which have saved countless lives since.

A) Fleming was actually researching influenza viruses at the time.
B) He initially dismissed the observation as a failed experiment.
C) Instead of discarding the contaminated sample, he decided to investigate it further.
D) The mold was later identified as Penicillium rubrum.