Answer:
It's B
Step-by-step explanation:
Which of these had not yet happened when this article was written?
Press enter to interact with the item, and press tab button or down arrow until reaching the Submit button once the item is selected
A. Scientists found out which bacterium was responsible for the plague.
B. Doctors developed antibiotics to treat the disease caused by Y. pestis.
C. Researchers found different versions of the bacterium Y. pestis.
D. People got the bubonic plague after coming into contact with rats.
(i clicked B the first time and got it wrong, this is for Achieve3000 btw)